Proxying a request through node from front end to different server

app.js

//public/javascripts/app/app.js

define(function (require) {
	//require dependancies
	var Marionette = require('backbone.marionette');
	var Backbone = require('backbone');
	var $ = require('jquery');

	// Override renderer to use pre-compiled templates
	Marionette.Renderer.render =  function render(template, data) {
		return template(data);
	};

	// Create, configure, and return application object
	var app = new Marionette.Application();

	app.addRegions({
		mainRegion: '#main'
	});

	app.addInitializer(function (options) {
		this.router = options.router;
		this.models = new Backbone.Model();
		this.views = new Backbone.Model();
	});

	app.on('initialize:after', function () {
		$(function () {
			Backbone.history.start();
		});
	});

	return app;
});

controller.js

//public/javascripts/app/controller.js

define(function (require) {
	var config = require('config');
	var app = require('./app');
	var Backbone = require('backbone');
	var Marionette = require('backbone.marionette');
	var BaseCollection = require('models/base-collection');

	var Application = Backbone.Model.extend({url: function url(){
		return.config.rest + 'v1/applications/{id}';
	});

	var Applications = Backbone.Collection.extend({model: Application,url: function url() {
		return config.rest + 'v1/applications';
	}});

	app.addInitializer(function () {
		this.models.set({
			applications: new Applications()
		});
	});

	var controller = {
		showApps: function showMongoAppCenter(reloadDeveloper) {
			app.models.get('applications').fetch({
				success: function success() {
					console.log('fetch apps', arguments);
				},
				error: function error() {
					console.log('error', arguments);
				}
			});
		}
	};

	return controller;
});

default.js

//config/default.js

module.exports = {
	restProxy: {
		host: "www.ex.com",
		port: 443,
		https: true
	},
	restServerURI: 'https://www.ex.com/'
};

myconfig.js

//lib/myconfig.js

var config = require('config');

module.exports = {
	clientConfig: function (session) {
		return {
			rest: config.rest,
		};
	}
};