How to use

exit

function

in

1/process

listen(port = process.env.PORT) {
  const welcome = p => () =>
   l.info(
    `up and running in ${process.env.NODE_ENV ||
    'development'} @: ${os.hostname()} on port: ${p}}`
   );

  this.routes(app);
  try {
   http.createServer(app).listen(port, welcome(port));
  } catch (error) {
   l.error(error);
   exit(1);
  }

  return app;
 }