The right side of the bottom image
would be the static project page and the left side is stricty discourse. And in turn the right side setup would be linked from a very top level edgeryders.eu page. The path back from pure Discourse to the other pages would have a kind of wrapper-like aspect similar to the Roots link Matt gave (https://discourse.roots.io/).
On that very top page falls the task of explaining our universe to people in ways that make sense enough for them to want to get involved or tell their story, etc. As well as giving complete navigability to whomever shows up.