Matthew_Cash you won't be able to achieve that via an apache/nginx rule.
Flarum is a Single Page App and it's the javascript router that decides which page is shown in the front-end.
To do that you would need an extension that registers a new route in both the backend (so the page is answered with the SPA) and frontend (so the SPA loads the right page).
An apache/nginx rule might be able to get you around setting up the backend route, but not the frontend one.
