Enable multiplatform container build

.github/workflows/image-make-and-publish.yml

@@ -33,8 +33,11 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@main
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
 
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
@@ -73,6 +76,7 @@ jobs:
         id: build-and-push
         uses: docker/build-push-action@v2
         with:
+          platforms: linux/amd64,linux/arm64
           context: .
           build-args: |
             APP_VERSION=${{ steps.calver.outputs.current }}