Pro-Tips: Pattern for Express(Node) with error handling

expressPattern.js

var app = express();

//All routes to hook it up to
app.use('/', rootModule); 
app.use('/module1', module1);
app.use('/module2', module2);

//Handle other requests that doesnot fall through above routes
app.use(function (req, res, next) {
  next(createError(404));
});

//Finally handle any global errors(un-handelled) here(check err in handler)
app.use(function (err, req, res, next) {
   // render the error page or alike
  res.status(err.status || 500);
  res.send(req.app.get('env') === 'development' ? err : {});
});

module.exports = app;