fix: build and push to docker registry on tag creation (#121)

Signed-off-by: Skye Gill <gill.skye95@gmail.com>

Signed-off-by: Skye Gill <gill.skye95@gmail.com>

.github/workflows/release-please.yml

@@ -4,6 +4,11 @@ on:
   push:
     branches:
       - main
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   release-please:
     runs-on: ubuntu-latest
@@ -48,3 +53,46 @@ jobs:
               config/webhook/certificate.yaml
               config/rendered/release.yaml
               config/samples/end-to-end.yaml
+
+  build-oci:
+    needs: release-please
+    runs-on: ubuntu-latest
+    if: ${{ needs.release-please.outputs.release_created }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@master
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@master
+
+      - name: Build
+        uses: docker/build-push-action@v2
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}