I've been wondering this myself. Personally I want to have a backend and then a SPA for each app. On one hand that sounds like overengineering, you could just

I've been wondering this myself. Personally I want to have a backend and then a SPA for each app. On one hand that sounds like overengineering, you could just serve everything from the backend. On the other hand, separation of the API from the services could actually be a simplification.