retention of overleaf backups

scripts/data-backup/backup-overleaf-cleanup.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+BACKUP_DIR="$HOME/docker/compose/project/service/overleaf-toolkit/backup"
+ls -t "$BACKUP_DIR" | tail -n +6 | xargs -I {} rm -rf "$BACKUP_DIR/{}"
+