code: def serve_frontend(file: str, flow_name: str, host: str, port: int):
      """This staticmethod runs the specified frontend for a given flow in a new process.
  
      It is organized under cloud runtime to indicate that it will be used by the cloud runner but otherwise, no cloud
      specific logic is being implemented here.
  
      """
      _set_frontend_context()
      logger.debug(
          f"Run Serve Frontend {file} {flow_name} {host} {port}"
      )
      app = load_app_from_file(file)
      if flow_name not in app.frontends:
          raise ValueError(
              f"Could not find frontend for flow with name {flow_name}."
          )
      frontend = app.frontends[flow_name]
      assert frontend.flow.name == flow_name
  
      frontend.start_server(host, port)
  
imports: import inspect
  import logging
  import os
  import signal
  import sys
  import time
  import traceback
  from functools import partial
  from multiprocessing import Process
  from typing import Callable, Dict, List, Optional, Tuple, TypedDict
label_desc: Use image node_id 4 for calling a global function with example usage: serve_frontend(file, flow_name, host, port) without return types