[headscale] Add headscale

lib/systems/fugitive/default.nix

@@ -5,6 +5,7 @@ let
   ports = {
     ssh = [ 2322 2323 2324 ];
     gitea = 10010;
+    headscale = 10020;
   };
 
 in
@@ -13,12 +14,14 @@ in
   imports = [
     ./hardware.nix
     ../../modules/gitea
+    ../../modules/headscale
     ../../users/christian
   ];
 
   services = {
     gitea.enable = true;
     nginx.enable = true;
+    headscale.enable = true;
     openssh = {
       enable = true;
       ports = ports.ssh;