Async Start The ExpressJS Server Function - waits for the server to be ready before returning from function

start.the.express.server.js

const startTheExpressServer = async (expressApp, port, key, cert) => {
  const https = require('https');
  let server = null;

  const promise = new Promise((resolve, _) => {
    server = https.createServer({
      key,
      cert,
    }, expressApp).listen(port, async () => {
      console.log(`server is listening to ${port}`);
      resolve();
    });
  });

  await promise;

  return server;
};

exports.startTheExpressServer = startTheExpressServer;