{ modulesPath, lib, ... }:
{
  imports = lib.optional (builtins.pathExists ./do-userdata.nix) ./do-userdata.nix ++ [
    ./hardware-configuration.nix
    ./gitea.nix
    ./nginx.nix
    ./coturn.nix
  ];
      boot = {
        growPartition = true;
        kernelParams = [ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
        initrd.kernelModules = [ "virtio_scsi" ];
        kernelModules = [ "virtio_pci" "virtio_net" ];
        loader = {
          grub.device = "/dev/sda";
          timeout = 0;
          grub.configurationLimit = 0;
        };
      };
      services.openssh = {
        enable = true;
        passwordAuthentication = false;
	ports = [5522];
      };
      services.do-agent.enable =  true;
      networking = {
        hostName =  "sortug"; # use Digital Ocean metadata server
      };
      networking.firewall = {
        enable = true;
	allowedTCPPorts = [ 40308 80 443 53 51820 5522 ];
	allowedUDPPorts = [ 40308 80 443 53 51820 5522 
    50000
    50001
    50002
    50003
    50004
    50005
    50006
    50007
    50008
    50009
    50010
  ];
      };
}