AWS: Support CDN split to S3 + LB

[BSick7]

Summary

It is extremely common for users to structure their app as a front-end UI + back-end API that is served through a single CDN. The CDN is set up like this:

• By default, the traffic is sent to static assets
• All requests with path /api/* are sent to a load balancer that forwards to a container

Add this pattern as a first-class citizen to Nullstone.

1. Docs and demo videos show users how to do it
2. Add any infrastructure modules necessary to make this happen

How will it work?

TBD