Thanks for you answers!
I updated the guide:
- Recommend using an empty drive to avoid possible trouble if Debian/Refind try to use an existing EFI boot partition.
- clarify the various options when installing Debian
– Don’t select a desktop environment
– Don’t use a username that will be an future Yunohost user
– Don’t separate the /home, /var or /tmp partitions.
– Use the default mirror and default hostname