title: Validation in Railway.js on module object
body: <p>am new to Railway.js (one of those cases where someone else wrote this peace of software that I now need to update - great grr!) </p>
  
  <p>I got a "Notification" model and want to add validation that if user don't provide a field from the UI I display a error like: "Message Required"</p>
  
  <p>How do I do this?</p>
  
  <p>Thank you!</p>