restic-monitor: Never Miss a Failed Backup

I run restic to back up my servers. One day I noticed a repository hadn’t received a new snapshot in weeks. The backup job had been silently failing, and I had no idea. That’s the worst kind of failure: everything appears fine until you actually need the backup. TL;DR /stv0g/restic-monitor is a small Go tool that checks whether each of your restic repositories has a recent enough snapshot and…