fixes for ci

.github/workflows/docker.yml

@@ -32,6 +32,10 @@ jobs:
         with:
           version: latest
           install: true
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          config-inline: |
+            [worker.oci]
+            max-parallelism = 1
       
       - name: Builder instance name
         run: echo ${{ steps.buildx.outputs.name }}