The Docker support with Google's Cloud Repository is not officially supported yet. However, you can use a workaround by using docker pull and docker run in the setup and run sections of your task YAML. Here are the steps:

1. Run gcloud auth configure-docker <your-location>.pkg.dev locally.
2. Add the following section in your task YAML:

  ~/.docker/config.json: ~/.docker/config.json```

3. Launch your task using `sky launch`.