Also link to the best practices.

Remove ref to deprecated alertmanager url flag

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

Redirect docs/prometheus/latest/querying/rules

Fixes prometheus/prometheus#3451
Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

We support the SignalFx metric proxy as Prometheus Remote Storage.

Added a draft of a "first steps" guide. Very rough, could be expanded or
contracted and very open to feedback. I added the scaffolding for guides
as an example of how they might work but not attached to their menu
placement, nav icon, etc, etc.

A faster and easier-to-use kafka exporter

Add Cortex & CrateDB as additioanl remote storage integrations.

Thanks to @juliusv for mentioning them in irc.

Neither of these anchor tags work atm.

Escape the links in the same way known-working FAQ.md does.
See the link to configuration#<scrape_config>:
https://prometheus.io/docs/introduction/faq/#why-don-t-the-prometheus-server-components-support-tls-or-authentication-can-i-add-those

Remove done items from the roadmap

We have too many now.

Prometheus 2.0 announcement blog post

Versioned documentation

This reverts commit af282717.