fix: frontend api

Author: sunng87

src/frontend/src/server.rs

@@ -258,7 +258,7 @@ where
                 opts.keep_alive.as_secs(),
                 common_runtime::global_runtime(),
                 user_provider.clone(),
-                Some(self.instance.process_manager().clone()),
+                self.instance.process_manager().clone(),
             )) as Box<dyn Server>;
 
             handlers.insert((pg_server, pg_addr));