Merge pull request #268979 from con-f-use/warn_docker_storage_driver

        default = null;

        description =

          lib.mdDoc ''

            This option determines which Docker storage driver to use. By default

            it let's docker automatically choose preferred storage driver.

            This option determines which Docker

            [storage driver](https://docs.docker.com/storage/storagedriver/select-storage-driver/)

            to use.

            By default it lets docker automatically choose the preferred storage

            driver.

            However, it is recommended to specify a storage driver explicitly, as

            docker's default varies over versions.

            ::: {.warning}

            Changing the storage driver will cause any existing containers

            and images to become inaccessible.

            :::

          '';

      };