Upload and display image with NodeJS and Express.

app.js

/*
* Module dependencies.
*/
var express    = require('express')    
    , routes   = require('./routes')
    , user     = require('./routes/user')
    , common    = require('./routes/common')
    , fs       = require('fs')
    , http     = require('http')
    , util     = require('util')
    , path     = require('path');

var app = express();


/*
 * connect middleware - please note not all the following are needed for the specifics of this example but are generally used.
 */
app.configure(function() {
    app.set('port', process.env.PORT || 3000);
    app.set('views', __dirname + '/views');
    app.use(express.favicon());
    app.use(express.logger('dev'));
    app.use(express.bodyParser({ keepExtensions: true, uploadDir: __dirname + '/public/uploads' }));
    app.use(express.methodOverride());
    app.use(app.router);
    app.use(express.static(path.join(__dirname, '/public')));
    app.use(express.static(__dirname + '/static'));
    app.use(express.errorHandler());
});

//File upload
app.get('/upload', common.imageForm);
app.post('/upload', common.uploadImage);


http.createServer(app).listen(app.get('port'), function(){
    console.log('Express server listening on port ' + app.get('port'));
});

common.js

var util = require('util');

exports.imageForm = function(req, res) {
    res.render('upload', {
        title: 'Upload Images'
    });
};

exports.uploadImage = function(req, res, next){
        console.log('file info: ',req.files.image);

        //split the url into an array and then get the last chunk and render it out in the send req.
        var pathArray = req.files.image.path.split( '/' );

        res.send(util.format(' Task Complete \n uploaded %s (%d Kb) to %s as %s'
            , req.files.image.name
            , req.files.image.size / 1024 | 0
            , req.files.image.path
            , req.body.title
            , req.files.image
            , '<img src="uploads/' + pathArray[(pathArray.length - 1)] + '">'
        ));


};

upload.jade

extends layout

block content
    form(action="/upload", method="post", enctype="multipart/form-data")
        input(type="text", name="title")
        input(type="file", multiple, name="image")
        button(type="submit", value="Upload") Upload File

Why does the path to the routes dependency start with ./ but non of the other dependencies have that?
I'm guessing the code is a little dated now? I can't get it to run because when I install routes with npm there are no user or common directories in it:

Error: Cannot find module 'routes/user'