How to include three.js to node.js

Question

How to include three.js to node.js

Hello guys i got problem with node.js

I got my server in node.js

var app = require('http').createServer(handler)
, io = require('socket.io').listen(app)
, fs = require('fs')

app.listen(8086);

function handler (req, res) {
  fs.readFile('./cube.html',
  function (err, data) {
   if (err) {
     res.writeHead(500);
  return res.end('Error loading spinnycube.html');
}

res.writeHead(200);
res.end(data);
  });
}

io.sockets.on('connection', function (socket) {
 socket.emit('news', { hello: 'world' });
   socket.on('my other event', function (data) {
 console.log(data);
  });
});

My cube html:

<!DOCTYPE html>
<html>
<head>
 <title>WebGL/Three.js Step Tutorial</title>
<style>
 body {
  margin: 0px;
  background-color: #fff;
  overflow: hidden;
 }
 </style>
</head>
 <body>
 <script src="three.min.js"></script>
 <script src="cube.js"></script>
</body>
</html>

and cube.js:

var camera;
var scene;
var renderer;
var mesh;

init();
animate();

function init() {

 scene = new THREE.Scene();
 camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000);

 var light = new THREE.DirectionalLight( 0xffffff );
 light.position.set( 0, 1, 1 ).normalize();
 scene.add(light);

 var geometry = new THREE.CubeGeometry( 10, 20, 10);
// var material = new THREE.MeshPhongMaterial( { ambient: 0x050505, color: 0x0033ff,     specular: 0x555555, shininess: 30 } );
var material = new THREE.MeshPhongMaterial( { map:     THREE.ImageUtils.loadTexture('box.jpg') } );
 mesh = new THREE.Mesh(geometry, material );
 mesh.position.z = -50;
 scene.add( mesh );

 renderer = new THREE.WebGLRenderer();
 renderer.setSize( window.innerWidth, window.innerHeight );
 document.body.appendChild( renderer.domElement );

 window.addEventListener( 'resize', onWindowResize, false );

 render();
 }


 function animate() {
 //mesh.rotation.x += .03;
 mesh.rotation.y += .03;

 render();
 requestAnimationFrame( animate );
 }


 function render() {
 renderer.render( scene, camera );
 }


 function onWindowResize() {
 camera.aspect = window.innerWidth / window.innerHeight;
 camera.updateProjectionMatrix();
 renderer.setSize( window.innerWidth, window.innerHeight );
 render();
 }

And it doesn't work ;/ If I change patch in node.js from fs.readFile('./cube.html', to (__dirname + './cube.html', then it throws Error loading spinnycube.htm.

Can someone explain me why it works that ?

Of course I include my lib in the same folder if I open cube.html. Using my browser it works perfectly but when I try start server id doesn't show the 3D.

EDIT.

When I change my HTML like this it works:

<!DOCTYPE html>
<html>
  <head>
<title>Stronka sie odpala</title>
<style>
 body {
  margin: 0px;
  background-color: #fff;
  overflow: hidden;
     }
   </style>
  </head>
  <body>
 <script src="http://threejs.org/build/three.min.js"></script>

   <script>

var camera;
var scene;
var renderer;
var mesh;

init();
animate();

function init() {

scene = new THREE.Scene();
 camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000);

 var light = new THREE.DirectionalLight( 0xffffff );
 light.position.set( 0, 1, 1 ).normalize();
 scene.add(light);

 var geometry = new THREE.CubeGeometry( 10, 20, 10);
var material = new THREE.MeshPhongMaterial( { ambient: 0x050505, color: 0x0033ff, specular: 0x555555, shininess: 30 } );
// var material = new THREE.MeshPhongMaterial( { map:     THREE.ImageUtils.loadTexture('box.jpg') } );
 mesh = new THREE.Mesh(geometry, material );
 mesh.position.z = -50;
 scene.add( mesh );

 renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
 document.body.appendChild( renderer.domElement );

 window.addEventListener( 'resize', onWindowResize, false );

 render();
 }


 function animate() {
 //mesh.rotation.x += .03;
 mesh.rotation.y += .03;

 render();
 requestAnimationFrame( animate );
 }


 function render() {
 renderer.render( scene, camera );
 }


 function onWindowResize() {
 camera.aspect = window.innerWidth / window.innerHeight;
 camera.updateProjectionMatrix();
 renderer.setSize( window.innerWidth, window.innerHeight );
 render();
 }

   </script>
  </body>
</html>

But why when I include <script> with patch it doesn't work? Another question is when I add to node.js simple HTML site with hyperlink the next site will not appear. Any conclusion?

node.js
three.js