github workflow

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/docker-publish.yml

@@ -0,0 +1,72 @@
+name: Docker publish
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  buildandpush:
+    runs-on: ubuntu-latest
+    steps:
+
+      # https://github.com/marketplace/actions/checkout
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: true
+
+      # https://github.com/booxmedialtd/ws-action-parse-semver
+      - name: Parse version
+        id: semver-version
+        uses: booxmedialtd/ws-action-parse-semver@v1
+        with:
+          input_string: ${{ steps.package-version.outputs.current-version}}
+
+      # https://github.com/docker/setup-qemu-action#usage
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      # https://github.com/marketplace/actions/docker-setup-buildx
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      # https://github.com/docker/login-action#docker-hub
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOKCERHUB_PASSWORD }}
+
+      # https://github.com/docker/metadata-action
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ github.repository }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+
+      # https://github.com/docker/build-push-action#multi-platform-image
+      - name: Build and push to Docker Hub
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64
+          labels: ${{ steps.meta.outputs.labels }}
+          tags: ${{ steps.meta.outputs.tags }}
+
+      # https://github.com/peter-evans/dockerhub-description
+      - name: Update repo description
+        uses: peter-evans/dockerhub-description@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          repository: ${{ github.repository }}
+          short-description: ${{ github.event.repository.description }}