Add a note about the exact dir where to run `gdk install` command
requested to merge vzagorodny/gitlab-development-kit:vzagorodny-add-gdk-install-run-dir-note into master
Before, it was not so clear where to run the gdk install command after cloning the gitlab-ce or gitlab-ee repo and running gdk init. This addition tries to fix this problem.
Edited by Victor Zagorodny