nixos/twingate: init module

nixos/modules/module-list.nix

@@ -965,6 +965,7 @@
   ./services/networking/tox-node.nix
   ./services/networking/toxvpn.nix
   ./services/networking/tvheadend.nix
+  ./services/networking/twingate.nix
   ./services/networking/ucarp.nix
   ./services/networking/unbound.nix
   ./services/networking/unifi.nix

nixos/modules/services/networking/twingate.nix

@@ -0,0 +1,28 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.twingate;
+
+in {
+
+  options.services.twingate = {
+    enable = mkEnableOption (lib.mdDoc "Twingate Client daemon");
+  };
+
+  config = mkIf cfg.enable {
+
+    networking.firewall.checkReversePath = lib.mkDefault false;
+    networking.networkmanager.enable = true;
+
+    environment.systemPackages = [ pkgs.twingate ]; # for the CLI
+    systemd.packages = [ pkgs.twingate ];
+
+    systemd.services.twingate.preStart = ''
+      cp -r -n ${pkgs.twingate}/etc/twingate/. /etc/twingate/
+    '';
+
+    systemd.services.twingate.wantedBy = [ "multi-user.target" ];
+  };
+}