code: def set_exit_handler(self):
          
          signal.signal(signal.SIGINT, self.manage_signal)
          signal.signal(signal.SIGTERM, self.manage_signal)
          signal.signal(signal.SIGHUP, self.manage_signal)
          signal.signal(signal.SIGQUIT, self.manage_signal)
docs: Set the signal handler to manage_signal (defined in this class)
          Only set handlers for signal.SIGTERM, signal.SIGINT, signal.SIGUSR1, signal.SIGUSR2
  
          :return: None