[tasks] Add more visibility to backups

README.md

@@ -21,3 +21,22 @@ VROBBLER_KEEP_DETAILED_SCROBBLE_LOGS=True
 VROBBLER_DATABASE_URL="postgres://vrobbler:<pass>@db.service:5432/vrobbler"
 VROBBLER_REDIS_URL="redis://:<pass>@cache.service:6379/0"
 ```
+
+## Database Backup
+
+A backup command is available via `./manage.py backup_database` (also runs on a cron schedule via Celery). It dumps the database with `pg_dump`, compresses with gzip, and optionally copies the backup to a remote host via SCP.
+
+Configure these additional settings as needed:
+
+```
+DB_BACKUP_SSH_KEY="/path/to/ssh/private/key"
+DB_BACKUP_SSH_DEST="user@backup.example.com:/remote/path/"
+DB_BACKUP_NTFY_URL="https://ntfy.sh/your-topic"
+```
+
+- `DB_BACKUP_SSH_KEY` — Path to the SSH private key used for remote copy.
+- `DB_BACKUP_SSH_DEST` — SCP destination (user@host:path). If set alongside SSH_KEY, the backup is copied to the remote host and old backups are pruned.
+- `DB_BACKUP_NTFY_URL` — ntfy.sh URL for success notifications. Defaults to `https://ntfy.unbl.ink/backups`.
+
+Retention is hardcoded: keeps daily backups for 7 days, plus one per month for 12 months.
+```