make buildx instance use host network to keep dns as expected

buildx-qemu/entrypoint.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 update-binfmts --enable
-docker buildx create --use
+docker buildx create --driver docker-container --driver-opt network=host --name image-builder --use
 docker buildx inspect --bootstrap
 
 exec "$@"