Add instructions for using composer and npm inside the containers
Add instructions for using composer and npm inside the containers

pmattmann/ecamp3,pmattmann/ecamp3,ecamp/ecamp3,usu/ecamp3,usu/ecamp3,ecamp/ecamp3,pmattmann/ecamp3,ecamp/ecamp3,usu/ecamp3,pmattmann/ecamp3,ecamp/ecamp3,usu/ecamp3