provision:
  - mode: system
    script: |
      #!/bin/sh
      set -eux
      cat <<'EOF' > /etc/docker/daemon.json
        {
          "registry-mirrors": [
            "<https://docker.registry.cache.com>",
            "<https://registry-1.docker.io>",
            "<https://quay.io>"
          ]
        }
      EOF

~/Library/Application\ Support/rancher-desktop/lima/_config/override.yaml

$ rdctl shell -- cat /etc/docker/daemon.json
{
  "features": {
    "containerd-snapshotter": false
  }
}