bring buildkit back but set a version

Author: michaeldwan

.github/workflows/ci.yaml

@@ -10,12 +10,14 @@ jobs:
     # env:
     #   DOCKER_BUILDKIT: 0
     steps:
-      # -
-      #   name: Set up QEMU
-      #   uses: docker/setup-qemu-action@v2
-      # -
-      #   name: Set up Docker Buildx
-      #   uses: docker/setup-buildx-action@v2
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+        with:
+          version: v0.9.1
       -
         name: Login to DockerHub
         uses: docker/login-action@v1