whats nodebb's main rss feed url?
You can see the rss routes here.
There really isn't a 'main' route. recent.rss or recentposts.rss is probably what you want though.
Once you have 3 reputation that limitation is removed so you should be good now 🙂
It is installed automatically when you install the Redis server.
@avi Depends, NodeBB connects using oAuth2, so if you can support that. Yes.