* create backup direcotry
create a backup folder and move the gitea backup to backup.yml
* make the backup on update optional
Documentation and introduction of the variable `gitea_backup_on_upgrade: false`
* change become_method to sudo
change become_method to sudo as suggested by @wzzrd. removed become_flags.
* Full path to gitea binary in backup task. thanks to @wzzrd
L3D