add gcr mirro

dockerfiles/dind/Dockerfile

@@ -29,8 +29,7 @@ RUN wget -O /tmp/scout.tar.gz https://github.com/docker/scout-cli/releases/downl
 
 
 # Add bash completion and set bash as default shell
-RUN mkdir /etc/bash_completion.d \
-    && curl -sS https://raw.githubusercontent.com/docker/cli/master/contrib/completion/bash/docker -o /etc/bash_completion.d/docker \
+RUN curl -sS https://raw.githubusercontent.com/docker/cli/master/contrib/completion/bash/docker -o /etc/bash_completion.d/docker \
     && sed -i "s/ash/bash/" /etc/passwd
 
 # Replace modprobe with a no-op to get rid of spurious warnings

dockerfiles/dind/daemon.json

@@ -2,6 +2,7 @@
     "experimental": true,
     "debug": true,
     "log-level": "info",
+    "registry-mirrors": ["https://mirror.gcr.io"],
     "insecure-registries": [
         "127.0.0.1"
     ],