backup docs

docs/backup.md

@@ -0,0 +1,25 @@
+---
+layout: default
+title: Backup
+permalink: /backup
+nav_order: 5
+---
+
+## Backup
+
+The following commands should be valid for every setup (docker/debian/sqlite/postgres) but check your installation directory first.
+This includes database, configuration, custom user locales, media, images and thumbnails.
+
+```bash
+cd /opt/gancio/ # or /home/gancio
+tar --ignore-failed-read -czf gancio-$(date +%Y-%m-%d-%H%M%S)-backup.tgz \
+  config.json \
+  uploads \
+  user_locale \
+  db.sqlite \
+  postgres \
+  data
+```
+
+> info "Automatic backup"
+> To periodically backup your data you should probably use something like [restic](https://restic.net) or [borg](https://www.borgbackup.org/)