Updated https://gist.github.com/danivijay/e0bb66f851f0bb3f49a797423f679070 with ES6

srcServer-v2.js

import express from 'express';
import path from 'path';
import open from 'open';

const port = 3000; //choose different, if this port not available
const app = express();

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

app.listen(port, function(err) {
  if (err) {
    console.log(err);
  } else {
    open('http://localhost:' + port);
  }
});