express server run with both http and https

server.js

const express = require('express');
const path = require('path');
const util = require('util');
const fs = require('fs');
const morgan = require('morgan')
const https = require('https')
const app = express();

//static
app.use(express.static(path.join(__dirname,'./public')));

app.use(morgan('tiny'))

app.get('/',(req,res)=>{
  res.sendFile('main.html',{root:__dirname+'/views'});
});

const port = 50001;
app.listen(port,()=>{
  console.log('listening on localhost:'+port)
});

app.use(function(err, req, res, next) {
  // Do logging and user-friendly error message display
  res.status(500).send({status:500, message: 'internal error', type:'internal'}); 
  console.error(err);
})

// https
const certificate = {
  key:fs.readFileSync(path.join(__dirname,'../build/myCert.test.key')),
  cert:fs.readFileSync(path.join(__dirname,'../build/myCert.test.crt'))
}
https.createServer(certificate,app).listen(443)