code: func (f *faucet) listenAndServe(port int) error {
  	go f.loop()
  
  	http.HandleFunc("/", f.webHandler)
  	http.Handle("/api", websocket.Handler(f.apiHandler))
  
  	return http.ListenAndServe(fmt.Sprintf(":%d", port), nil)
  }
docs: // listenAndServe registers the HTTP handlers for the faucet and boots it up
  // for service user funding requests.