I run a Phabricator cluster (although it's probably much simpler than the #phacility cluster). I'm curious as to how @epriestley manages the configuration for the #phacility cluster? Previously I had used a `conf/custom/mydomain.php` file for managing configuration, but I later moved to using `local.json` as I think (from memory, can't find any references anywhere) that the `local.json` approach is generally preferred over the `conf/custom` approach.
Is there a better way for managing configuration in a cluster though?