feat: enable integrated mode

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

hosts/hosting-01/default.nix

@@ -2,8 +2,13 @@
   inputs,
   config,
   pkgs,
+  lib,
   ...
 }:
+let
+  settingsFormat = pkgs.formats.yaml { };
+  headscaleConfig = settingsFormat.generate "headscale-settings.yaml" config.services.headscale.settings;
+in
 {
   imports = [
     ./disk-config.nix
@@ -59,6 +64,10 @@
     };
   };
 
+  environment.etc."headscale/config.yaml".source = lib.mkForce (
+    settingsFormat.generate "headscale-config.yaml" config.services.headscale.settings
+  );
+
   services.headplane = {
     enable = true;
     agent.enable = false;
@@ -73,8 +82,11 @@
 
       headscale = {
         url = "https://headscale.escapeangle.com";
-        config_strict = false;
+        config_path = "${headscaleConfig}";
+        config_strict = true;
       };
+
+      integration.proc.enabled = true;
     };
   };