express-demo.js

'use strict';

let express = require('express');
let bodyParser = require('body-parser');
let path = require('path');
let app = express();
let publicDir = '/public';
let port = 8080;

app.use(bodyParser.json());

app.use(express.static(publicDir));

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

app.listen(port);