How to configure dynamic routes with express.js

I would do the same thing you did for /modules/:name

app.get('/article/:id', function(req , res){
  res.render('article' + req.params.id);
});

It would be more meaningful from a rest point of view.

If you cannot do it for any particular reason you might want to do something like:

var articlesEndpoints = ['/article2', '/article3'];
articlesEndpoints.forEach(function(name) {
  app.get(name, function(req, res) {
    res.render(name);
  });
});

Is this what you meant?