file.js

// get your dependancies
// read up on ES modules or CJS modules. 
// but this here is CJS modules
const express = require('express');
const http = require('http');
const path = require('path');

const app = express(); // create your express app 
const server = http.createServer(app); // create your server, and pass it the app as its options, this will let express use that servers incoming and outgoing channels. 

// unlike php+apache you have to handle your own static files. 
// so if someone requests yoursite.com/images/image.png you need
// to know to serve that. 
// express.static to the rescue, it will expose everything in the directory
// you specify, good for images, css files, client side js files, etc. 
app.use( express.static( path.join( __dirname, 'static' ) ) );

// start building your router
// this will accept a route, then a callback for your handler 
// in this case '/' is yoursite.com/ root 
app.get('/', function( request, response ) {
	res.sendFile( 'index.html', {
		root: 'static',
		headers: {
			'Content-Type': 'text/html'
		}
	}, errorHandler);
});

function errorHandler(error) {
	// handle errors and such
}

server.listen( 8080 ); // make the server listen on a port. 

Thank you!