It’s done.
It’s just a test, so if it doesn’t work you should try the official YunoHost raspberry pi image.
edit (i mess with my gsm) : http://ovh.to/NnGTEJY
Default user/password : pi / raspberry
For security please change the password before update and process the YunoHost installation as describe sumary in this topic Image 64bits en download pour raspberry
Hope it could helps you to enjoy YunoHost.
ppr