Add ci docker push (#504)

.github/workflows/release_publish_docker-image.yml

@@ -0,0 +1,62 @@
+name: Publish Docker image
+on:
+  release:
+    types:
+      - released
+      - prereleased
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - 
+        name: Check out the repo
+        uses: actions/checkout@v2
+      -
+        name: Prepare
+        id: prep
+        run: |
+          DOCKER_IMAGE=crowdsecurity/crowdsec
+          VERSION=edge
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          elif [[ $GITHUB_REF == refs/heads/* ]]; then
+            VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
+          elif [[ $GITHUB_REF == refs/pull/* ]]; then
+            VERSION=pr-${{ github.event.number }}
+          fi
+          TAGS="${DOCKER_IMAGE}:${VERSION}"
+          echo ::set-output name=docker_image::${DOCKER_IMAGE}
+          echo ::set-output name=version::${VERSION}
+          echo ::set-output name=tags::${TAGS}
+          echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
+      - 
+        name: Tag Latest
+        id: prep_tag_latest
+        if: "github.event.release.release"
+        run: |
+          TAGS=${{ steps.prep.outputs.tags }},${{ steps.prep.outputs.docker_image }}:latest
+          echo ::set-output name=tags::${TAGS}
+          echo ::set-output name=version::${{ steps.prep.outputs.version }}
+          echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
+      - 
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.prep.outputs.tags }}
+          labels: |
+            org.opencontainers.image.source=${{ github.event.repository.html_url }}
+            org.opencontainers.image.created=${{ steps.prep.outputs.created }}
+            org.opencontainers.image.revision=${{ github.sha }}

README.md

@@ -95,6 +95,12 @@ cd crowdsec-v*
 sudo ./wizard.sh -i
 ```
 
+## :whale2: Docker
+
+You can use docker to run crowdsec, by using [official docker image](https://hub.docker.com/r/crowdsecurity/crowdsec).
+
+You can also build the docker image following [this](https://github.com/crowdsecurity/crowdsec/tree/master/docker#build) 
+
 ## ⚙️ Build it !
 
 If you want to build crowdsec yourself follow these steps: