simplified workflow

.github/workflows/publish-docker.yml

@@ -31,6 +31,10 @@ jobs:
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
+        with:
+            context:
+                platforms: linux/amd64, linux/arm64
+                tags: ${{ steps.meta.output.tags }}
       -
         name: Login to DockerHub
         uses: docker/login-action@v1