Compiling scss manually


I was wondering if it were possible to create the main.css yourself via cli.

Backstory: We need to create a container app for 120+ customers and currently we have 120+ apps with different variables.scss files. Since Apple dropped a bomb on it’s developers and are ignoring any contact, we are going to create a container app. We would like to retrieve these different stylesheets from a server (which we already got working) But now i need a way to build 120+ different versions of main.css

With best regards,
Robin Hinderiks