Update doc for project init
add in doc
PROJECT_HOME="~/Workspace/code.europa.eu/digit-c4/dev/best-practices"
mkdir -p $(dirname $PROJECT_HOME)
git clone git@code.europa.eu:digit-c4/netbox/netbox-rps-plugin.git $PROJECT_HOME \
&& cd $PROJECT_HOME \
&& git submodule update --init --recursive