enable docker buildx

Author: masci

.github/workflows/docker-publish.yml

@@ -22,6 +22,9 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v4