Is there a way to leverage close/finish events on http.ServerResponse?

Hi there - first, thanks for all your work.

My question is if there is a way to add some logic that leverages the close event of the response (docs). My use case is logging a summary of the request/response like so:

import { Request, Response, NextFunction} from 'express';
import { logger } from '../utils/logger';

export const serviceLogMiddleware = (req: Request, res: Response, next: NextFunction): void => {
  // See https://nodejs.org/api/http.html#http_event_close_1
  res.on('close', () => {
    logger.log({
      level: 'info',
      req: {
        method: req.method,
        originalUrl: req.originalUrl,
        url: req.url
      },
      res: {
        statusCode: res.statusCode
      }
    });
  });
  next();
};

It seems as soon as the response is returned that the server code stops executing and no logs are emitting (though they do when running the express app locally). Is this just an inherent limitation of running Express on Lambda? If so, any suggestions for being able to log a "summary" of the request/response?

Thanks!

dougmoscrop / serverless-http

Is there a way to leverage close/finish events on http.ServerResponse? #197