devServer.js

var path = require('path');
var os = require('os');
var express = require('express');
var webpack = require('webpack');
var config = require('./webpack.config.dev');

var app = express();
var compiler = webpack(config);

app.use('/img', express.static('./example/imgs'));

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

app.use(require('webpack-hot-middleware')(compiler));


app.get('*', function(req, res) {
	res.sendFile(path.join(__dirname, 'example/index.html'));
});

app.listen(3000, '0.0.0.0', function(err) {
	if (err) {
		console.log(err);
		return;
	}

	var ifaces = os.networkInterfaces();
	Object.keys(ifaces).forEach(function (ifname) {
		var alias = 0;

		ifaces[ifname].forEach(function (iface) {
			if ('IPv4' !== iface.family || iface.internal !== false) {
				// skip over internal (i.e. 127.0.0.1) and non-ipv4 addresses
				return;
			}

			if (alias >= 1) {
				// this single interface has multiple ipv4 addresses
				console.log(ifname + ':' + alias, iface.address);
			} else {
				// this interface has only one ipv4 adress
				console.log(ifname, iface.address);
			}
			++alias;
		});
	});

	console.log('Listening at http://localhost:3000');
});