Build multi-architecture image

Build image output both for amd64 & arm64

.github/workflows/github-image.yml

@@ -29,6 +29,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
         
+      - name: Setup qemu
+        uses: docker/setup-qemu-action@v2.1.0
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v2.5.0
+
       - name: Log in to the Container registry
         uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
         with:
@@ -46,6 +52,7 @@ jobs:
         uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}