Preview: Documenting config.json settings (pre-Mattermost v1.0)

@it33 If the documentation isn’t fixed by the time I figure it out myself I’ll definitely consider putting together a PR. At the moment I don’t have a working instance myself yet. My comment about the documentation being unclear stems from the fact that I had doubts about whether that was the part of my config that was broken or not. After I get that figured out and try a few setups on for size I might be in a position to make the documentation more explicit.

Frankly it seems the universal assumption is that everybody is going to want to run Docker and so far only a handful of us seem to have even tried it on bare metal servers with the service running directly on the host. The pain points and hence what needs to be documented are pretty different and at least until a few more distro packagers pick this up we’re kind of stabbing in the dark. (BTW I’m helping to sort out an ArchLinux package for this.)