Add route to restore box from backup

Part of #439

src/scripts/restart.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -eu -o pipefail
+
+readonly INFRA_VERSION_FILE=/home/yellowtent/platformdata/INFRA_VERSION
+
+if [[ ${EUID} -ne 0 ]]; then
+    echo "This script should be run as root." > /dev/stderr
+    exit 1
+fi
+
+if [[ $# == 1 && "$1" == "--check" ]]; then
+    echo "OK"
+    exit 0
+fi
+
+if [[ "${BOX_ENV}" == "cloudron" ]]; then
+    systemctl restart box
+fi
+