Using node.js as a simple web server

I want to run a very simple HTTP server. Every GET request to example.com should get index.html served to it but as a regular HTML page (i.e., same experience as when you read normal web pages).

Using the code below, I can read the content of index.html. How do I serve index.html as a regular web page?

var http = require('http');
var fs = require('fs');
var index = fs.readFileSync('index.html');

http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end(index);
}).listen(9615);

One suggestion below is complicated and requires me to write a get line for each resource (CSS, JavaScript, images) file I want to use.

How can I serve a single HTML page with some images, CSS and JavaScript?