Xdebug comes pre-installed. To enable xdebug you need to add a couple environment variables:
ENABLE_XDEBUG=1
This will add the xdebug.ini to your php extensionsXDEBUG_CONFIG=remote_host=you.local.ip.here remote_port=port
Sets an xdebug remote host environment var. This is usually your actual local computers IP. this is for debug on your local computerPHP_IDE_CONFIG=serverName=NameUsedInPhpStormServerConfig
This is an example of how to use this in PhpStorm. You configure a server in php storm with a name, set that in this var.