Add guildhall

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

services/authelia.nix

@@ -49,6 +49,7 @@ in
             { domain = "reddit.nordhammer.it";    policy = "one_factor"; }
             { domain = "panel.nordhammer.it";     policy = "one_factor"; subject = admin; }
             { domain = "stardew.nordhammer.it";  policy = "one_factor"; }
+            { domain = "guildhall.nordhammer.it"; policy = "one_factor"; }
             # Health data: only the two people the app knows about.
             { domain = "flowtrack.nordhammer.it"; policy = "one_factor"; subject = [ "user:kayla" "user:fred" ]; }
           ];

services/guildhall.nix

@@ -0,0 +1,16 @@
+# services/guildhall.nix — Guildhall, the co-op idle game for friends.
+#
+# The game and NixOS module live in the standalone guildhall flake. nginx is
+# the only public listener; Authelia admits any account, and the game keys
+# each player on the Remote-User it passes through. Nightly snapshots sit
+# next to flowtrack's on the SSD branch of the pool.
+{ config, lib, ... }:
+{
+  config = lib.mkIf (config.networking.hostName == "FredOS-Mediaserver") {
+    services.guildhall = {
+      enable = true;
+      port = 8098;
+      backup.directory = "/mnt/disk2/backups/guildhall";
+    };
+  };
+}

services/nginx.nix

@@ -210,6 +210,13 @@ in
             proxy_set_header Remote-User $user;
           '';
         };
+        # Co-op idle game. Players are keyed on Remote-User, so nginx must
+        # always overwrite it with the Authelia identity.
+        "guildhall.nordhammer.it" = lib.recursiveUpdate (protectedProxy 8098) {
+          locations."/".extraConfig = autheliaAuthConfig + ''
+            proxy_set_header Remote-User $user;
+          '';
+        };
 
         # Pelican game panel. Can't turn off its own login (no such option
         # upstream), so Authelia is the outer gate and the Pelican account