extend time limitation

web_server.py

@@ -474,7 +474,7 @@ class EnvHandlerManager:
                     expired_env_ids = [
                         env_id
                         for env_id, handler in self._env_handlers.items()
-                        if handler and ((current_time - handler.created_time).total_seconds() > 3600 * 1.5 or (current_time - handler.last_active_time).total_seconds() > 180)
+                        if handler and ((current_time - handler.created_time).total_seconds() > 3600 * 3.0 or (current_time - handler.last_active_time).total_seconds() > 180)
                     ]
                 for env_id in expired_env_ids:
                     self.close_env_handler(env_id)