feat(plugins/docker): add Docker publish support

plugins/docker.sh

@@ -0,0 +1,33 @@
+#!/bin/sh
+set -eu
+
+release() {
+  # Build and publish a `Docker` tag
+  if [ -n "${DOCKER_HUB_PAT-}" ]; then
+    log "Building and publishing Docker image..."
+    log_verbose "Docker tag: $NEXT_RELEASE_TAG and version: $NEXT_RELEASE_VERSION!"
+
+    # Don't load this plugin if
+    # - `--dry-run` used
+    # - `Dockerfile` is missing
+    if ! $IS_DRY_RUN; then
+      if [ ! -f Dockerfile ]; then
+        log "Project does not have Dockerfile"
+        return 1
+      fi
+
+      docker build . -t "$GIT_REPO_NAME:$NEXT_BUILD_VERSION"
+      docker push "$GIT_REPO_NAME:$NEXT_BUILD_VERSION"
+
+      log "Docker image published [$NEXT_RELEASE_TAG]!"
+    else
+      log "Skipped Docker image [$NEXT_RELEASE_TAG] in DRY-RUN mode."
+    fi
+  else
+    echo "
+Docker Personal Access Token is not found
+Please export Docker Personal Access Token so this plugin can be used
+"
+    exit 1
+  fi
+}