[hotfix] fix crontab (so backups will run)
- symptom: backup script not running from crontab every morning
- cause: we placed the crontab in (possibly incorrect) location for user-based crontabs (/var/spool/cron/crontabs/root), which also potentially requires installing the crontab for it to run
- fix: instead: place the crontab in the location for systemwide crontabs (/etc/crontab) and specify that our job should be run by root
side-effect:
- log the output of the backup job to /tmp/backups.log and include a timestamp of when the last job ran to enable easier spot-checking
- eradicate the hourly restart job from our crontab