Use Github Actions to build and publish the docker image

.github/workflows/publish-artifacts.yaml

@@ -0,0 +1,61 @@
+name: Publish Docker 🐳 images 📦 to GitHub Container Registry
+
+on:
+  push:
+    tags:
+      - '**'
+
+jobs:
+  build-and-publish-to-ghcr:
+    # Explicitly grant the `secrets.GITHUB_TOKEN` permissions.
+    permissions:
+      # Grant the ability to write to GitHub Packages (push Docker images to
+      # GitHub Container Registry).
+      packages: write
+    name: Build and publish Docker 🐳 images 📦 to GitHub Container Registry
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout main
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+
+      - name: Write version
+        run: ./scripts/insert-version-pyproject.sh ${{github.ref_name}}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          # This is the user that triggered the Workflow. In this case, it will
+          # either be the user whom created the Release or manually triggered
+          # the workflow_dispatch.
+          username: ${{ github.actor }}
+          # `secrets.GITHUB_TOKEN` is a secret that's automatically generated by
+          # GitHub Actions at the start of a workflow run to identify the job.
+          # This is used to authenticate against GitHub Container Registry.
+          # See https://docs.github.com/en/actions/security-guides/automatic-token-authentication#about-the-github_token-secret
+          # for more detailed information.
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image
+        uses: docker/build-push-action@v5
+        with:
+          push: true # push the image to ghcr
+          tags: >
+            ghcr.io/thought-machine/generic-k8s-webhook:${{github.sha}},
+            ghcr.io/thought-machine/generic-k8s-webhook:${{github.ref_name}}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64,linux/arm64

.github/workflows/test-pr.yaml

@@ -34,3 +34,21 @@ jobs:
 
       - name: Run unittests
         run: make unittests
+
+  build-docker-image:
+    name: Build docker image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Action
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build image
+        uses: docker/build-push-action@v5