server.js

/* server.js - Express server*/
'use strict';
const log = console.log
log('Express server')

const express = require('express')
const app = express();

const path = require('path');

app.use(express.static(path.join(__dirname, '/pub')))
app.get('/', (req, res) => {

	res.send('<h1>root route. Go to /examples.html to see example</h1>')
})

// Error codes
app.get('/problem', (req, res) => {
	res.status(500).send('There was a problem on the server')
})

// will use an 'environmental variable', process.env.PORT, for deployment.
const port = process.env.PORT || 5000
app.listen(port, () => {
	log(`Listening on port ${port}...`)
})  // localhost development port 5000  (http://localhost:5000)
   // We've bound that port to localhost to go to our express server.
   // Must restart web server when you make changes to route handlers.