nix-cfg/hosts/vps1/services/factorio.nix

{ config, data, ...}:
{
  services.factorio = {
    enable = true;
    public = false;
    game-name = "Lgm's Factorio Game";
    openFirewall = true;
    autosave-interval = 5;
    extraSettings = {
      autosave-slots = 8;
    };
    extraSettingsFile = "/var/lib/${config.services.factorio.stateDirName}/server-settings-extra.json";
  };
}