server.js

var http = require('http');
var express = require('express');
var app = express();

app.use(require('morgan')('short'));

(function initWebpack() {
	var webpack = require('webpack');
	var webpackConfig = require('./webpack.config.js');
	var compiler = webpack(webpackConfig);

	app.use(require('webpack-dev-middleware')(compiler, {
		noInfo: true, publicPath: webpackConfig.output.publicPath,
	}));

	app.use(require('webpack-hot-middleware')(compiler, {
		log: console.log, path: '/__webpack_hmr', heartbeat: 10 * 1000,
	}));

	app.use(express.static(__dirname + '/'));
})();

app.get('/', function root(req, res) {
	res.sendFile(__dirname + '/index.html');
});

if (require.main === module) {
	var server = http.createServer(app);
	server.listen(process.env.PORT || 2018, function onListen() {
		var address = server.address();
		console.log('Listening on: %j', address);
		console.log(' -> that probably means: http://localhost:%d', address.port);
	});
}