When trying to check if the last version is installed, I get the following error message:

Arf ! Veuillez vérifier les droits sur le répertoire /home/user/apps/FreshRSS-dev. Le serveur HTTP doit être capable d’écrire dedans

Why does the check-last-available-version need to have the write permission on the whole tree?

I think it is to write the last check datetime. But this datetime should be stored into the data directory, no?