Killing sails app on grunt error

bootstrap.js

module.exports.bootstrap = function(cb) {
  sails.after('hook:grunt:error', function(error) {
    sails.log.error('Grunt error! Lowering sails app...');
    sails.lower(function() {
      sails.log.error("Sails process stopped");
      process.exit(1);
    });
  });
  // It's very important to trigger this callback method when you are finished
  // with the bootstrap!  (otherwise your server will never lift, since it's waiting on the bootstrap)
  cb();
};