diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..aeaa50e
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,10 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_size = 2
+indent_style = space
+trim_trailing_whitespace = true
+continuation_indent_size = 4
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..cb5ab64
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+* text=auto
+*.bat   text eol=crlf
+gradlew text eol=lf
diff --git a/.github/actions/docker-install-macos/action.yml b/.github/actions/docker-install-macos/action.yml
new file mode 100644
index 0000000..7068fbb
--- /dev/null
+++ b/.github/actions/docker-install-macos/action.yml
@@ -0,0 +1,17 @@
+---
+name: "Install Docker on macOS"
+description: "Performs an unattended install of Docker Desktop for MacOS"
+runs:
+  using: "composite"
+  steps:
+    # From https://github.com/docker/for-mac/issues/2359#issuecomment-943131345
+    - run: |
+        brew install --cask docker
+        sudo /Applications/Docker.app/Contents/MacOS/Docker --unattended --install-privileged-components
+        open -a /Applications/Docker.app --args --unattended --accept-license
+        while ! /Applications/Docker.app/Contents/Resources/bin/docker info &>/dev/null; do sleep 1; done
+      shell: bash
+branding:
+  icon: "tag"
+  color: "blue"
+...
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..6337115
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "gradle"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    open-pull-requests-limit: 20
diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
new file mode 100644
index 0000000..b024026
--- /dev/null
+++ b/.github/workflows/cd.yml
@@ -0,0 +1,33 @@
+---
+name: Publish
+on:
+  push:
+    branches:
+      - main
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: 8
+          cache: 'gradle'
+      - name: build publish
+        run: ./gradlew clean build publish --info --stacktrace
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ORG_GRADLE_PROJECT_signingKey: ${{ secrets.GPG_SIGNING_KEY }}
+          ORG_GRADLE_PROJECT_signingPassword: ${{ secrets.GPG_SIGNING_PASSWORD }}
+      - name: Publish Test Report
+        if: ${{ always() }}
+        uses: scacap/action-surefire-report@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          report_paths: '**/build/test-results/test/TEST-*.xml'
+...
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..5f5e70f
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,48 @@
+---
+name: CI
+on:
+  workflow_dispatch:
+  push:
+    branches-ignore:
+      - main
+jobs:
+  ci-build:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+        java: [ 8, 11, 17 ]
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: ${{ matrix.java }}
+          cache: 'gradle'
+      - name: Install Docker on macOS
+        if: matrix.os == 'macos-latest'
+        uses: ./.github/actions/docker-install-macos
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: docker version
+        run: docker version
+      - name: docker info
+        run: docker info
+      - name: java version
+        run: java -version
+      - name: clean build
+        run: ./gradlew clean build --info --stacktrace
+      - name: Publish Test Report
+        if: ${{ always() }}
+        uses: scacap/action-surefire-report@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          report_paths: '**/build/test-results/test/TEST-*.xml'
+...
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..c318f23
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,41 @@
+---
+name: Release
+on:
+  release:
+    types:
+      - released
+#      - published
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: 8
+          cache: 'gradle'
+      - name: Set artifact version
+        run: |
+          echo "RELEASE_VERSION=$(echo '${{ github.event.release.tag_name }}' | sed -e s/^v//)" >> $GITHUB_ENV
+      - name: build publish
+        run: ./gradlew clean build publish closeAndReleaseStagingRepository --info --stacktrace -Pversion="${{ env.RELEASE_VERSION }}"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ORG_GRADLE_PROJECT_signingKey: ${{ secrets.GPG_SIGNING_KEY }}
+          ORG_GRADLE_PROJECT_signingPassword: ${{ secrets.GPG_SIGNING_PASSWORD }}
+          SONATYPE_STAGING_PROFILE_ID: ${{ secrets.SONATYPE_STAGING_PROFILE_ID }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+      - name: Publish Test Report
+        if: ${{ always() }}
+        uses: scacap/action-surefire-report@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          report_paths: '**/build/test-results/test/TEST-*.xml'
+...
diff --git a/.github/workflows/update-gradle-wrapper.yml b/.github/workflows/update-gradle-wrapper.yml
new file mode 100644
index 0000000..bcaeb4c
--- /dev/null
+++ b/.github/workflows/update-gradle-wrapper.yml
@@ -0,0 +1,18 @@
+name: Update Gradle Wrapper
+
+on:
+  workflow_dispatch:
+  schedule:
+    # "weekly" https://crontab.guru/every-week
+    - cron: "0 0 * * 0"
+
+jobs:
+  update-gradle-wrapper:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Update Gradle Wrapper
+        uses: gradle-update/update-gradle-wrapper-action@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: gradle/wrapper-validation-action@v1
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fffb395
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+.gradle
+.idea
+*.iml
+build/
+classes/
+.DS_Store
+out/
+*.settings
+*.project
+*bin/
+*.classpath
diff --git a/RELEASE.md b/RELEASE.md
new file mode 100644
index 0000000..68f98a1
--- /dev/null
+++ b/RELEASE.md
@@ -0,0 +1,15 @@
+## Publishing
+
+Packages are automatically published from the `main` branch to the GitHub Package Registry.
+Manually cut releases will be published to both GitHub Package Registry and Maven Central.
+
+## Release Workflow
+
+There are multiple GitHub Action Workflows for the different steps in the package's lifecycle:
+
+- CI: Builds and checks incoming changes on a pull request
+  - triggered on every push to a non-default branch
+- CD: Publishes the Gradle artifacts to GitHub Package Registry
+  - triggered only on pushes to the default branch
+- Release: Publishes Gradle artifacts to Sonatype and releases them to Maven Central
+  - triggered on a published GitHub release using the underlying tag as artifact version, e.g. via `git tag -m "$MESSAGE" v$(date +"%Y-%m-%dT%H-%M-%S")`
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..f86229f
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,66 @@
+import java.text.SimpleDateFormat
+import java.util.*
+
+rootProject.extra.set("artifactVersion", SimpleDateFormat("yyyy-MM-dd\'T\'HH-mm-ss").format(Date()))
+
+plugins {
+  id("maven-publish")
+  id("com.github.ben-manes.versions") version "0.42.0"
+  id("net.ossindex.audit") version "0.4.11"
+  id("io.freefair.maven-central.validate-poms") version "6.4.1"
+  id("io.github.gradle-nexus.publish-plugin") version "1.1.0"
+}
+
+val dependencyVersions = listOf(
+  "org.jetbrains:annotations:23.0.0"
+)
+
+val dependencyVersionsByGroup = mapOf<String, String>(
+)
+
+subprojects {
+  repositories {
+//    mavenLocal()
+//    fun findProperty(s: String) = project.findProperty(s) as String?
+//    maven {
+//      name = "github"
+//      setUrl("https://maven.pkg.github.com/docker-client/*")
+//      credentials {
+//        username = System.getenv("PACKAGE_REGISTRY_USER") ?: findProperty("github.package-registry.username")
+//        password = System.getenv("PACKAGE_REGISTRY_TOKEN") ?: findProperty("github.package-registry.password")
+//      }
+//    }
+    mavenCentral()
+  }
+}
+
+allprojects {
+  configurations.all {
+    resolutionStrategy {
+      failOnVersionConflict()
+      force(dependencyVersions)
+      eachDependency {
+        val forcedVersion = dependencyVersionsByGroup[requested.group]
+        if (forcedVersion != null) {
+          useVersion(forcedVersion)
+        }
+      }
+    }
+  }
+}
+
+fun findProperty(s: String) = project.findProperty(s) as String?
+
+val isSnapshot = project.version == "unspecified"
+nexusPublishing {
+  repositories {
+    if (!isSnapshot) {
+      sonatype {
+        // 'sonatype' is pre-configured for Sonatype Nexus (OSSRH) which is used for The Central Repository
+        stagingProfileId.set(System.getenv("SONATYPE_STAGING_PROFILE_ID") ?: findProperty("sonatype.staging.profile.id")) //can reduce execution time by even 10 seconds
+        username.set(System.getenv("SONATYPE_USERNAME") ?: findProperty("sonatype.username"))
+        password.set(System.getenv("SONATYPE_PASSWORD") ?: findProperty("sonatype.password"))
+      }
+    }
+  }
+}
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..04ebd19
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,14 @@
+org.gradle.daemon=true
+
+group=de.gesellix
+
+github.package-registry.owner=docker-client
+github.package-registry.repository=docker-registry
+github.package-registry.username=
+github.package-registry.password=
+
+sonatype.snapshot.url=https://oss.sonatype.org/content/repositories/snapshots/
+sonatype.staging.url=https://oss.sonatype.org/service/local/staging/deploy/maven2/
+sonatype.staging.profile.id=
+sonatype.username=
+sonatype.password=
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..41d9927
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..41dfb87
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..1b6c787
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/lib/build.gradle.kts b/lib/build.gradle.kts
new file mode 100644
index 0000000..4a651c8
--- /dev/null
+++ b/lib/build.gradle.kts
@@ -0,0 +1,129 @@
+import java.text.SimpleDateFormat
+import java.util.*
+
+plugins {
+  id("groovy")
+  id("java-library")
+  id("maven-publish")
+  id("signing")
+  id("com.github.ben-manes.versions")
+  id("net.ossindex.audit")
+  id("io.freefair.maven-central.validate-poms")
+}
+
+java {
+  sourceCompatibility = JavaVersion.VERSION_1_8
+  targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+dependencies {
+  constraints {
+    listOf(
+      "org.jetbrains.kotlin:kotlin-reflect",
+      "org.jetbrains.kotlin:kotlin-stdlib",
+      "org.jetbrains.kotlin:kotlin-stdlib-jdk8",
+      "org.jetbrains.kotlin:kotlin-stdlib-common",
+      "org.jetbrains.kotlin:kotlin-test"
+    ).onEach {
+      implementation(it) {
+        version {
+          strictly("[1.5,1.7)")
+          prefer("1.6.10")
+        }
+      }
+    }
+    implementation("com.squareup.okio:okio") {
+      version {
+        strictly("[2.5,4)")
+        prefer("3.0.0")
+      }
+    }
+  }
+  implementation("de.gesellix:docker-remote-api-client:2022-02-23T13-45-00")
+  implementation("de.gesellix:docker-remote-api-model-1-41:2022-02-23T11-47-00")
+  implementation("de.gesellix:docker-engine:2022-02-22T23-12-00")
+
+  implementation("org.slf4j:slf4j-api:[1.7,)!!1.7.36")
+  testImplementation("ch.qos.logback:logback-classic:[1.2,2)!!1.2.10")
+
+  testImplementation("org.codehaus.groovy:groovy:[3,4)!!3.0.9")
+  testImplementation("org.spockframework:spock-core:2.1-groovy-3.0")
+}
+
+tasks.withType<Test> {
+  useJUnitPlatform()
+}
+
+val javadocJar by tasks.registering(Jar::class) {
+  dependsOn("classes")
+  archiveClassifier.set("javadoc")
+  from(tasks.javadoc)
+}
+
+val sourcesJar by tasks.registering(Jar::class) {
+  dependsOn("classes")
+  archiveClassifier.set("sources")
+  from(sourceSets.main.get().allSource)
+}
+
+artifacts {
+  add("archives", sourcesJar.get())
+  add("archives", javadocJar.get())
+}
+
+fun findProperty(s: String) = project.findProperty(s) as String?
+
+val isSnapshot = project.version == "unspecified"
+val artifactVersion = if (!isSnapshot) project.version as String else SimpleDateFormat("yyyy-MM-dd\'T\'HH-mm-ss").format(Date())!!
+val publicationName = "dockerRegistry"
+publishing {
+  repositories {
+    maven {
+      name = "GitHubPackages"
+      url = uri("https://maven.pkg.github.com/${property("github.package-registry.owner")}/${property("github.package-registry.repository")}")
+      credentials {
+        username = System.getenv("GITHUB_ACTOR") ?: findProperty("github.package-registry.username")
+        password = System.getenv("GITHUB_TOKEN") ?: findProperty("github.package-registry.password")
+      }
+    }
+  }
+  publications {
+    register(publicationName, MavenPublication::class) {
+      pom {
+        name.set("docker-registry")
+        description.set("Docker Registry/Distribution abstraction")
+        url.set("https://github.com/docker-client/docker-registry")
+        licenses {
+          license {
+            name.set("MIT")
+            url.set("https://opensource.org/licenses/MIT")
+          }
+        }
+        developers {
+          developer {
+            id.set("gesellix")
+            name.set("Tobias Gesellchen")
+            email.set("tobias@gesellix.de")
+          }
+        }
+        scm {
+          connection.set("scm:git:github.com/docker-client/docker-registry.git")
+          developerConnection.set("scm:git:ssh://github.com/docker-client/docker-registry.git")
+          url.set("https://github.com/docker-client/docker-registry")
+        }
+      }
+      artifactId = "docker-docker-registry"
+      version = artifactVersion
+      from(components["java"])
+      artifact(sourcesJar.get())
+      artifact(javadocJar.get())
+    }
+  }
+}
+
+signing {
+  val signingKey: String? by project
+  val signingPassword: String? by project
+  useInMemoryPgpKeys(signingKey, signingPassword)
+  sign(publishing.publications[publicationName])
+}
diff --git a/lib/src/main/java/de/gesellix/docker/registry/DockerRegistry.java b/lib/src/main/java/de/gesellix/docker/registry/DockerRegistry.java
new file mode 100644
index 0000000..270d527
--- /dev/null
+++ b/lib/src/main/java/de/gesellix/docker/registry/DockerRegistry.java
@@ -0,0 +1,119 @@
+package de.gesellix.docker.registry;
+
+import de.gesellix.docker.engine.DockerClientConfig;
+import de.gesellix.docker.remote.api.ContainerCreateRequest;
+import de.gesellix.docker.remote.api.ContainerCreateResponse;
+import de.gesellix.docker.remote.api.ContainerInspectResponse;
+import de.gesellix.docker.remote.api.HostConfig;
+import de.gesellix.docker.remote.api.PortBinding;
+import de.gesellix.docker.remote.api.client.ContainerApi;
+import de.gesellix.docker.remote.api.client.ImageApi;
+import de.gesellix.docker.remote.api.core.ClientException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static java.util.Collections.emptyMap;
+import static java.util.Collections.singletonList;
+
+public class DockerRegistry {
+
+  private static final Logger log = LoggerFactory.getLogger(DockerRegistry.class);
+
+  private final ContainerApi containerApi;
+  private final ImageApi imageApi;
+
+  private String registryId;
+
+  public DockerRegistry() {
+    DockerClientConfig dockerClientConfig = new DockerClientConfig();
+    this.containerApi = new ContainerApi(dockerClientConfig);
+    this.imageApi = new ImageApi(dockerClientConfig);
+  }
+
+  public String getImageName() {
+    return LocalDocker.isNativeWindows() ? "gesellix/registry" : "registry";
+  }
+
+  public String getImageTag() {
+    return LocalDocker.isNativeWindows() ? "2.7.1-windows" : "2.7.1";
+  }
+
+  public void run() {
+    ContainerCreateRequest containerConfig = new ContainerCreateRequest();
+    containerConfig.setImage(getImageName() + ":" + getImageTag());
+    containerConfig.setEnv(singletonList("REGISTRY_VALIDATION_DISABLED=true"));
+    Map<String, Object> exposedPorts = new HashMap<>();
+    exposedPorts.put("5000/tcp", emptyMap());
+    containerConfig.setExposedPorts(exposedPorts);
+    HostConfig hostConfig = new HostConfig();
+    hostConfig.setPublishAllPorts(true);
+    containerConfig.setHostConfig(hostConfig);
+
+    ContainerCreateResponse registryStatus = run(containerConfig);
+    registryId = registryStatus.getId();
+  }
+
+  ContainerCreateResponse run(ContainerCreateRequest containerCreateRequest) {
+    log.info("docker run {}", containerCreateRequest.getImage());
+    ContainerCreateResponse createContainerResponse = createContainer(containerCreateRequest);
+    log.debug("create container result: {}", createContainerResponse);
+    String containerId = createContainerResponse.getId();
+    containerApi.containerStart(containerId, null);
+    return createContainerResponse;
+  }
+
+  ContainerCreateResponse createContainer(ContainerCreateRequest containerCreateRequest) {
+    log.debug("docker create");
+    try {
+      return containerApi.containerCreate(containerCreateRequest, null);
+    }
+    catch (ClientException exception) {
+      if (exception.getStatusCode() == 404) {
+        log.debug("Image '{}' not found locally.", containerCreateRequest.getImage());
+        imageApi.imageCreate(containerCreateRequest.getImage(),
+                             null, null, null, null,
+                             null, null, null, null);
+        return containerApi.containerCreate(containerCreateRequest, null);
+      }
+      throw exception;
+    }
+  }
+
+  public String address() {
+//        String dockerHost = dockerClient.config.dockerHost
+//        return dockerHost.replaceAll("^(tcp|http|https)://", "").replaceAll(":\\d+\$", "")
+
+//        def registryContainer = dockerClient.inspectContainer(registryId).content
+//        def portBinding = registryContainer.NetworkSettings.Ports["5000/tcp"]
+//        return portBinding[0].HostIp as String
+
+    // 'localhost' allows to use the registry without TLS
+    return "localhost";
+  }
+
+  public int port() {
+    ContainerInspectResponse registryContainer = containerApi.containerInspect(registryId, null);
+    List<PortBinding> portBinding = registryContainer.getNetworkSettings().getPorts().get("5000/tcp");
+    PortBinding firstPortBinding = portBinding.stream()
+        .findFirst()
+        .orElseThrow(() -> new RuntimeException("No PortBinding for port 5000/tcp"));
+    if (firstPortBinding.getHostPort() == null) {
+      throw new RuntimeException("Null PortBinding for port 5000/tcp");
+    }
+    return Integer.parseInt(firstPortBinding.getHostPort());
+  }
+
+  public String url() {
+    return address() + ":" + port();
+  }
+
+  public void rm() {
+    containerApi.containerStop(registryId, null);
+    containerApi.containerWait(registryId, null);
+    containerApi.containerDelete(registryId, null, null, null);
+  }
+}
diff --git a/lib/src/main/java/de/gesellix/docker/registry/LocalDocker.java b/lib/src/main/java/de/gesellix/docker/registry/LocalDocker.java
new file mode 100644
index 0000000..3be212c
--- /dev/null
+++ b/lib/src/main/java/de/gesellix/docker/registry/LocalDocker.java
@@ -0,0 +1,39 @@
+package de.gesellix.docker.registry;
+
+import de.gesellix.docker.engine.DockerClientConfig;
+import de.gesellix.docker.remote.api.SystemVersion;
+import de.gesellix.docker.remote.api.client.SystemApi;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class LocalDocker {
+
+  private static final Logger log = LoggerFactory.getLogger(LocalDocker.class);
+
+  public static boolean available() {
+    try {
+      DockerClientConfig dockerClientConfig = new DockerClientConfig();
+      SystemApi systemApi = new SystemApi(dockerClientConfig);
+      return "OK".equals(systemApi.systemPing());
+    }
+    catch (Exception e) {
+      log.info("Docker not available", e);
+      return false;
+    }
+  }
+
+  public static boolean isNativeWindows() {
+    DockerClientConfig dockerClientConfig = new DockerClientConfig();
+    SystemApi systemApi = new SystemApi(dockerClientConfig);
+    try {
+      SystemVersion systemVersion = systemApi.systemVersion();
+      String arch = systemVersion.getArch();
+      String os = systemVersion.getOs();
+      return "windows/amd64".equals(os + "/" + arch);
+    }
+    catch (Exception e) {
+      log.info("Docker not available", e);
+      throw new RuntimeException(e);
+    }
+  }
+}
diff --git a/lib/src/test/groovy/de/gesellix/docker/registry/DockerRegistrySpec.groovy b/lib/src/test/groovy/de/gesellix/docker/registry/DockerRegistrySpec.groovy
new file mode 100644
index 0000000..7a8cbe6
--- /dev/null
+++ b/lib/src/test/groovy/de/gesellix/docker/registry/DockerRegistrySpec.groovy
@@ -0,0 +1,23 @@
+package de.gesellix.docker.registry
+
+import spock.lang.Requires
+import spock.lang.Specification
+
+@Requires({ LocalDocker.available() })
+class DockerRegistrySpec extends Specification {
+
+  def "can determine registry url"() {
+    given:
+    DockerRegistry registry = new DockerRegistry()
+    registry.run()
+
+    when:
+    String registryUrl = registry.url()
+
+    then:
+    registryUrl =~ /^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})|localhost:\d{1,5}\u0024/
+
+    cleanup:
+    registry.rm()
+  }
+}
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..f7e7b43
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,2 @@
+rootProject.name = "docker-registry"
+include("lib")