Security risk for debian installation (develop branch)

The instructions for Debian installation in the develop branch are really unsafe. It requires to create a funkwhale user to run the server but it gives it sudo privilege! The instructions in the main branch were much safer as the funkwhale user didn't even have a shell.

Harmful instructions:

3. Finally, give the user sudo privileges. You need to do this so that the user can run administrative tasks.

usermod -aG sudo funkwhale