build multi-platform docker images

Author: matthieugouel

.github/workflows/docker.yml

@@ -26,27 +26,28 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Log in to the Container registry
-        uses: docker/login-action@327cd5a69de6c009b9ce71bce8395f28e651bf99
+        uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804
+        uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
-      - name: Sync theme submodule 
-        run: git submodule sync && git submodule update --init --recursive
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
       - name: Build and push Docker image
         id: push
-        uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true
+          platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}