Repo2docker roadmap review

My thinking was that we (the “team”) could use discourse to have this discussion async and only the few things that do need real time voice communication get picked up in the team meeting. (if we ramp up the number of roadmaps and checking in on them every few months we will spend most of our team meetings doing that :-/).

The other motivation is that this would make it easier for others to get involved in the process or at least see what is being discussed and how.