Enable CD for the Maven Build Cache Docker image (#12)

* Enable CD for the Maven Build Cache Docker image

* Update build-cache-cd.yml

* Enable buildx in CI

* Add Registry and image name

* Update build-cache-cd.yml

* Update build-cache-cd.yml

* Update build-cache-cd.yml

.github/workflows/build-cache-cd.yml

@@ -0,0 +1,44 @@
+name: Create and publish a Docker image
+on:
+  push:
+    # TODO: Remoce buildcache after merge
+    branches: ['main', 'buildcache']
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}-buidcache
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: function
+          file: "function/Dockerfile-buildcache"
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}