npm -v3.10.10

C:\Users\filbert\Desktop\app2>npm init --yes
Wrote to C:\Users\filbert\Desktop\app2\package.json:
{  "name": "app2",  "version": "1.0.0",  "description": "",  "main": "app2.js",  "scripts": {    
"test": "echo \"Error: no test specified\" && exit 1"
  },  "keywords": [],  "author": "",  "license": "ISC"}

C:\Users\filbert\Desktop\ch3>npm install express –save  
  npm WARN ch3@1.0.0 No description  
  npm WARN ch3@1.0.0 No repository field. 
   + express@4.15.4 updated
1 package in 3.63s

const path = require('path');const express = require('express');
const app = new express();const port = 4000;//app.use(express.static('public'));
app.get('/*', (req, res) => {
    /*const pathname = req.params['0'];    if(!pathname) {
        res.sendFile(path.join(__dirname, 'index.html'));        return;
    }*/
    res.sendFile(path.join(__dirname+'/index.html'));
});var server = app.listen(port, (error) => {  if (error) {    console.error(error);
  } else {    console.info('==> Listening on port %s. Open up http://localhost:%s/ in your browser.', port, port);
  }
});

C:\Users\filbert\Desktop\app2>node app2.js
==> Listening on port 4000. Open up http://localhost:4000/ in your browser.