is there a place to learn how to config at application level or module level?

[jobsfan]

is there a list of the setted config key(not a custom key named by ourselves)? I mean the built-in config keys.

[Ocramius]

Depends on the modules you have enabled. Out of the box, the ModuleManager component doesn't do anything else than looking at your config/application.config.php.

The defined configs keys for config/autoload/* come from the various modules you may have, one or which is usually zendframework/zend-mvc.

[weierophinney]

This repository has been closed and moved to laminas/laminas-skeleton-installer; a new issue has been opened at laminas/laminas-skeleton-installer#1.