NodeJS: NextJS Server to create production server with locally. created https certificates

server.js

const { createServer } = require("https");
const { parse } = require("url");
const next = require("next");
const fs = require("fs");
const port = 3000;
// const dev = process.env.NODE_ENV !== "production";
const dev = false;
const app = next({ dev });
const handle = app.getRequestHandler();

const httpsOptions = {
  key: fs.readFileSync("./certificates/localhost-key.pem"),
  cert: fs.readFileSync("./certificates/localhost.pem"),
};

app.prepare().then(() => {
  createServer(httpsOptions, (req, res) => {
    const parsedUrl = parse(req.url, true);
    handle(req, res, parsedUrl);
  }).listen(port, (err) => {
    if (err) throw err;
    console.log("ready - started server on url: https://localhost:" + port);
  });
});