Refactor Docker workflow for multi-arch builds

.github/workflows/Docker.yml

@@ -21,34 +21,46 @@ jobs:
             dockerfile: apps/OpenSign/Dockerhubfile
           - image: opensign/opensignserver
             dockerfile: apps/OpenSignServer/Dockerhubfile
+
     steps:
-      -
-        name: Checkout
+      - name: Checkout
         uses: actions/checkout@v3
-      -
-        name: Login to Docker Hub
+
+      # 👇 Enable emulation so we can build for arm64 on amd64 runners
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: linux/amd64,linux/arm64
+
+      # 👇 Enable Buildx for multi-arch builds
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
         uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - 
-        name: Extract metadata (tags, labels) for Docker
+
+      - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v4
         with:
           images: ${{ matrix.image }}
-      -
-        name: Debug - List files opensign
+
+      - name: Debug - List files opensign
         run: ls -R apps/OpenSign/  # Adjust the path as needed
-      -
-        name: Debug - List files opensignserver
+
+      - name: Debug - List files opensignserver
         run: ls -R apps/OpenSignServer/  # Adjust the path as needed  
-      -
-        name: Build and push
+
+      - name: Build and push (multi-arch)
         uses: docker/build-push-action@v4
         with:
           context: .
           file: ${{ matrix.dockerfile }}
           push: true
+          # 👇 Build for both AMD64 & ARM64
+          platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}