{
    "install_additional_ruby": {
        "image": "ubuntu:focal",
        "features": {
            "ruby": {
                "version": "3.1.2",
                "additionalVersions": "2.5,3.0.4"
            }
        }
    },
    "ruby_debian": {
        "image": "mcr.microsoft.com/devcontainers/base:bullseye",
        "features": {
            "ruby": {}
        }
    }
}