Documentation regarding configuration.

The configuration in /usr/local/etc/php-fpm.d/ is a bit unclear to me:

loot@92aa5b2f8217:/usr/local/etc# ls -la php-fpm.d/
total 56
drwxr-sr-x 2 root staff  4096 Jun  8 18:32 .
drwxrwsr-x 5 root staff  4096 Jun  8 18:32 ..
-rw-r--r-- 1 root staff   238 Jun  8 18:32 docker.conf
-rw-r--r-- 1 root staff 18508 Jun  8 18:32 www.conf
-rw-r--r-- 1 root staff 18508 Jun  8 18:32 www.conf.default
-rw-r--r-- 1 root staff    50 Jun  8 18:32 zz-docker.conf

What is the purpose of zz-docker.conf and docker.conf why are there 2 files?
Is this so that docker.conf gets includes before and zz-docker.conf after the pool configuration?

If that's the case doesn't it make sense to use aa-docker.conf for consistency?

Why would we always want to force the [www] pool to listen on [::]:9000?

It would be great if some documentation could be added regarding best / expected practices for changing configuration.

Review the image configuration associated with /usr/local/etc/php-fpm.d/, especially docker.conf, zz-docker.conf, and the [www] pool settings. Trace how the files are loaded and document their purposes, ordering, listening behavior, and expected configuration-customization practices. Done means these questions are answered clearly for image users.