Multi-platform image

.github/workflows/docker.yml

@@ -13,20 +13,30 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v3
         with:
           images: misskey/misskey
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
+
       - name: Build and Push to Docker Hub
         uses: docker/build-push-action@v2
         with:
           context: .
+          platforms: linux/amd64,linux/arm64,linux/arm64/v7
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}