Abstracting express routes

app.js

var express = require("express");

var routes = require("./lib/routes");

// You're existing code to instantiate the app.
var app = express();

// ... and configure it...

// Set your routes.
routes.init(app);

app.listen(3000, function(err) {
    if(err) {
        throw err;
    }
    
    console.log("Listening on port 3000");
})

routes.js

var data = require("./data");

module.exports = {
    init: function(app) {
        
        // Home page...
        app.get('/', function(req, res) {
            resp.render("index");
        });
        
        // Etc...
        
    }  
};