Backup script

README.md

@@ -77,9 +77,38 @@ docker-compose up --build
 
 ## Database
 
-SQLite database is stored as `drugs.db` in the project root. It's a single file that persists between container restarts. You can:
-- Backup by copying the file
-- Share with team members
+SQLite database is stored as `./data/drugs.db`. It's a single file that persists between container restarts.
+
+### Backups
+
+The Docker Compose stack includes a `backup` sidecar that creates a SQLite-safe compressed backup every hour and keeps backups for 7 days.
+
+Backups are stored in:
+
+```bash
+./data/backups/
+```
+
+The latest backup is also copied to:
+
+```bash
+./data/backups/latest.db.gz
+```
+
+To restore a backup:
+
+```bash
+docker compose stop backend backup
+gunzip -c data/backups/drugs-YYYY-MM-DDTHH-MM-SSZ.db.gz > data/drugs.db
+docker compose up -d backend backup
+```
+
+Backup interval and retention can be changed with:
+
+```bash
+BACKUP_INTERVAL_SECONDS=3600
+BACKUP_RETENTION_DAYS=7
+```
 
 ## Configuration