vol/rdmo-app empty after make

Hello
while trying to install and run the docker i realised that after doing a make fromscratch the vol/rdmo-app folder is created but is empty, this file remains ide if you leave in the conf.toml commented RDMO_INSTALL_URL=git+https://github.com/rdmorganiser/rdmo@2.0.2 or if you uncomment this line (i changed the version 1.8.2 by default by the latest version 2.1.2)
Is this empty folder normal? Should I manually make a git clone of rdmo-app in the vol folder?

If I understand correctly, this folder should contain the rdmo-app repository (https://github.com/rdmorganiser/rdmo-app) and therefore the manage.py file which is called via different aliases when you put it in the bashrc and which is also used to install rdmo and launch the server?

Furthermore, I'm wondering, in the event that this problem is resolved, how is the RDMO instance supposed to work? Is it supposed to start at the end of the make? or do we have to enter the container and launch it manually?

Thank you in advance
Gautier

Start by reading conf.toml and the make workflow, then trace how vol/rdmo-app and manage.py are expected to be created and used. Verify whether the empty directory is expected and document or correct the installation and server-start behavior described in the issue.