How to and where to write alias path


how and where do I need to write path alias to get something outside frontend on the project base? My project on apache is /Library/WebServer/Documents/docwork and I’m using the advanced template…

Does the alias go in params-local.php, in params.php or in commons/config/… or where? and how to get a level up the normal frontend?

Sorry, but I just can’t find out with the official documentation.

Thanks for your precious help.