Gh actionto auto publish docker image

.github/workflows/docker-publish.yml

@@ -0,0 +1,54 @@
+name: Docker publish
+
+on:
+  push:
+    branches:
+      - 'master'
+    tags:
+      - v'*.*'
+
+jobs:
+  docker:
+    environment: docker-registry
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: registry.hub.docker.com/${{ secrets.DOCKER_REGISTRY_USERNAME }}/ldap-user-manager
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to registry
+        uses: docker/login-action@v1
+        with:
+          registry: registry.hub.docker.com
+          username: ${{ secrets.DOCKER_REGISTRY_USERNAME }}
+          password: ${{ secrets.DOCKER_REGISTRY_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          secrets: |
+            GIT_AUTH_TOKEN=${{ secrets.DOCKER_REGISTRY_TOKEN }}