NodeJS version endpoint using Git hash

One way of versioning the webapps is using the last Git commit's hash.
If you want to build an API endpoint in NodeJS + Express where you check the last commit hash and use that as verion, you can use the following endpoint

router.get('/version', function (req, res) {
  exec('git log --pretty=format:"%h" -1', (err, stdout, stderr) => {
    if (err) {
      console.log(`error while getting last commit`, err);
      res.send('Unable to fetch last commit hash');
    } else {
      res.send(stdout);
    }
  });
});