"Landing page"

[DakotaNelson]

Right now, if you hit the root path (/), it 404s. This is, strictly speaking, not wrong, but it can be awfully confusing to just visit (for example) olin-api.example.com and get a 404 when you actually needed to visit olin-api.example.com/people/ for it to work.

A landing page at the root path, with some sort of assistance or pointer to the various blueprints (and maybe even the docs), would be very helpful for new users.