Fix client discovery in Matrix

modules/communication.nix

@@ -5,6 +5,7 @@
   services.matrix-synapse = {
     enable = true;
     server_name = "coolneng.duckdns.org";
+    public_baseurl = "https://matrix.coolneng.duckdns.org";
     listeners = [{
       port = 8008;
       tls = false;
@@ -12,7 +13,6 @@
         compress = true;
         names = [ "client" ];
       }];
-      x_forwarded = true;
     }];
     app_service_config_files =
       [ "/var/lib/matrix-synapse/telegram-registration.yaml" ];