* Update docs for config.yaml
(cherry picked from commit eb7d4bb251f8c59f4dba2ebce67e6a3d27bd233e)
* Add more settings
(cherry picked from commit 70cf34c7afaef23133d3215e957add6ffa3a4928)
* Config docs cleanup
* Update docker dev quickstart guide
* plugin settings
* Document currency support
* Add extra information for secret_key
* Slight tweaks to docker setup guide