how to use boilerplate as template with advanced git usage? 

i have doubts with this doc https://github.com/webdevops/php-docker-boilerplate/blob/master/documentation/DOCKER-STARTUP.md ?

do you mean that best practice is to fork this repo, copy and customize docker-compose.yml for each project (one fork for project) and add git submodules mounted at app dir pointing to our code repo? 

Thx in advance.