$ mkdir -p ~/.docker
	$ AUTH=$(echo -n "$REGISTRY_USERNAME:$REGISTRY_SECRET" | base64)
	# Note: If using Docker Hub, the registry URL is `https://index.docker.io/v1/` for the auth config
	$ cat < ~/.docker/config.json
	{
	  "auths": {
		  "$REGISTRY": {
		    "auth": "$AUTH"
		  }
	  }
	}
	EOF