[flake] the module now actually starts the prod server

flake.nix

@@ -123,6 +123,7 @@
             '');
         };
       });
-      nixosModules = { gatekeeper = import ./module.nix; };
+      nixosModules.gatekeeper = { config, pkgs, lib, ... }@args:
+        import ./module.nix (args // { self = self; system = pkgs.system; });
     };
 }