[S600] Install cronjobs/scripts to enable the workflow and run a real backup

[rija]

• cronjob for fixing permission
• manually run a real backup with rclone
• then ask ourselves are we comforable running the backup in a cron job too?
• Opportunity for pair working

[kencho51]

cron job testing documentation at here. The following processes have been tested:

1. Cron scheduling
2. Find and fix permissions
3. rclone sync --dry-run