nixos-config/common/services/syncthing.nix

{lib, ...}: {
  # File sync service
  # Web UI available at http://localhost:8384
  services.syncthing = {
    enable = true;
    user = lib.mkDefault "user";
    group = "users";

    openDefaultPorts = true;
    overrideFolders = false;
    overrideDevices = false;
  };
}