Change node.js process owner after bind on port 80

gistfile1.txt

app.listen(80, 'localhost', null, function() {
  // Listening
  try {
    console.log('Old User ID: ' + process.getuid() + ', Old Group ID: ' + process.getgid());
    process.setgid('users');
    process.setuid('orefalo');
    console.log('New User ID: ' + process.getuid() + ', New Group ID: ' + process.getgid());
  } catch (err) {
    console.log('Cowardly refusing to keep the process alive as root.');
    process.exit(1);
  }
});