That is an extremely simple architecture design. Reverse proxy to load balance two instances. Two instances with a cache talking to RDS and an EFS volume to ens

That is an extremely simple architecture design. Reverse proxy to load balance two instances. Two instances with a cache talking to RDS and an EFS volume to ensure uploads and files stay consistent. The networking is the bit that most people don't care about or see, but it's there, and that's it.