fix(reverse-proxy): forward WebSocket upgrades

configs/nixos/modules/services/reverse-proxy.nix

@@ -71,7 +71,10 @@ let
         extraConfig = lib.optionalString (route.clientMaxBodySize != null) ''
           client_max_body_size ${route.clientMaxBodySize};
         '';
-        locations."/".proxyPass = mkBackend address port;
+        locations."/" = {
+          proxyPass = mkBackend address port;
+          proxyWebsockets = true;
+        };
       };
     };