For minimum viable product we could have simply a static webpage providing some information and linking together chat and forum applications.
We also need a build process that goes GitHub → Live website.
For chat: https://rocket.chat/ https://github.com/RocketChat/Rocket.Chat
For forums: https://www.discourse.org/
For basic news/articles/etc: https://jekyllrb.com/
For witchcraft: https://facebook.github.io/react/