title: How to split an app's data per domain instead of per app instance?
body: <p>Let's say you build a simple blog system.</p>
  
  <p>Instead of having to publish this blog system across 3 different Heroku dynos which would be expensive for something so simple (requiring at least 2 dynos each so it wouldn't idle)... there's the option of possibly splitting the logic of 3 different domains on one app.</p>
  
  <p>How would you take the logic and data currently in place for one instance of the app, and then split it up so 3 different domains can use the data scoped to that domain? This is taking existing data to form this system.</p>
  
  <p>Sorry if this wasn't clear enough.</p>