Add lots of docs, mostly best practices.

Start out on the visualisation docs.

Expand overview, remove federation as a feature we don't have that yet.

Switch example variable to follow naming scheme.
I feel like there's too much "you want", "you should", etc. in this style.

Taking out the "you" in this concrete example could be done like: "Typically it makes sense to alert...".

Alternatives in other places could be to simply omit the "you should" sometimes and just leave it at the imperative form. E.g. below: "Only page on latency..."