emqx/changes/ce/feat-10156.en.md

Change the priority of the configuration:

1. If it is a new installation of EMQX, the priority of configuration is ENV > emqx.conf > HTTP API.
2. If EMQX is upgraded from an old version (i.e., the cluster-override.conf file still exists in EMQX's data directory), then the configuration priority remains the same as before. That is, HTTP API > ENV > emqx.conf.

Deprecated data/configs/local-override.conf.

Stabilizing the HTTP API for hot updates.