code:

const express = require('express');
const http = require('http');
const https = require('https');
const fs = require('fs');
const path = require('path');
const serveStatic = require('serve-static');
const WebSocket = require('ws');

const env = process.env.NODE_ENV || 'development';

// server

function readCert(filename) {
    const filepath = path.join(__dirname, '..', '..', 'private', '.dehydrated', 'certs', '[my-domain.com]', filename);
    if (!fs.existsSync(filepath)) {
        console.log('Warning: Missing SSL cert: ' + filename);
        return undefined;
    }
    return fs.readFileSync(filepath, 'utf8');
}

function createServer(app) {
    if (env !== 'production') return http.createServer(app);
    return https.createServer({
        cert: readCert('cert.pem'),
        key: readCert('privateKey.pem')
    }, app);
}

const app = express();
const server = createServer(app);
const wss = new WebSocket.Server({ server });

// http

if (env === 'production') {
    app.use('/.well-known', serveStatic(path.join(__dirname, '..', '..', 'public', '.well-known'))); // ssl signing
}

// primary

wss.on('connection', (ws) => {
    console.log('connection!');
});

// working

const port = process.env.PORT || 9090;

server.listen(port, () => {
    console.log(`Server running on port: ${port}`);
});