How to add https to your Node.js server

secure-node-server.js

// libraries
const express = require('express');
const https = require('https');
const fs = require('fs');
const cors = require('cors'); // Cross-Origin Resource Sharing

// setup express
const app = express();
app.use(cors());

// your routes
app.get('/some-route', (req, res) => {
  // your logic
  const yourData = { text: 'my data' };
  res.json(yourData);
});

app.set('port', 3003);

// Add in the path to the Let's Encrypt files
const sslOptions = {
  key: fs.readFileSync('/etc/letsencrypt/live/golightlyplus.com/privkey.pem'),
  cert: fs.readFileSync('/etc/letsencrypt/live/golightlyplus.com/fullchain.pem'),
  ca: fs.readFileSync('/etc/letsencrypt/live/golightlyplus.com/chain.pem'),
};

// startup the https server
https.createServer(sslOptions, app).listen(app.get('port'), () => {
  // eslint-disable-next-line no-console
  console.log(`Started app on port ${app.get('port')}.`);
});