const ipUtils = require('ip-utils');

(async () => {
  try {
    const privateIP = await ipUtils.getPrivateIP();
    console.log(`Private IP: ${privateIP}`);

    const port = await ipUtils.openPort(3000);
    console.log(`Port ${port} opened.`);
  } catch (err) {
    console.error(err);
  }
})();