watch-finished/routes/error.js

const errorHandler = (err, req, res, next) => {
  if (res.headersSent) return next(err);
  res.status(err.status || 500);
  res.render('error', {status:err.status, message:err.message});
  //res.status(500).send({ error: err.message || err || 'unknown error' });
};

module.exports = errorHandler;