Hello Community,
I would like to propose a possible improvement to the Remote Backup procedure, when using SFTP. Now (Hestia v1.0.5), there seems to be no option to login to a remote SFTP host using a key file instead of a password.
Having an option for SFTP with key file login, will certainly make the admins who have disabled password authentication in their servers, happy 
Hello Felix, if you have SSH Key auth already configured on the Hestia server (root user) and uploaded the public key on the remote, then just enter a invalid/random password for sftp remote backup server when adding it to Hestia.
To confirm that ssh key is setup properly:
sudo sftp -o Port=22 [email protected]
(backup scripts are running as root so testing with sudo is mandatory)