move scripts to backend

backend/scripts/create-backup.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# this scrips makes a backup file to /srv/var/userbackup-<site>-<timestamp>.gz
+set -e
+BACKUP_PATH=${BACKUP_PATH:-./var}
+backup_file=${BACKUP_PATH}/userbackup-${1}-$(date +%s).gz
+echo "make backup file for site $1 to $backup_file"
+curl "http://127.0.0.1:8081/api/v1/admin/export?site=${1}&secret=${SECRET}" > ${backup_file}
+echo "created backup ${backup_file}"