add retire.sh

this is a sudo script that retires the box

installer/src/scripts/retire.sh

@@ -1,30 +0,0 @@
-#!/bin/bash
-
-# This script is called once at the end of a cloudrons lifetime
-
-set -eu -o pipefail
-
-readonly BOX_SRC_DIR=/home/yellowtent/box
-
-arg_data=""
-
-args=$(getopt -o "" -l "data:" -n "$0" -- "$@")
-eval set -- "${args}"
-
-while true; do
-    case "$1" in
-    --data) arg_data="$2";;
-    --) break;;
-    *) echo "Unknown option $1"; exit 1;;
-    esac
-
-    shift 2
-done
-
-echo "Setting up splash screen"
-"${BOX_SRC_DIR}/setup/splashpage.sh" --retire --data "${arg_data}" # show splash
-"${BOX_SRC_DIR}/setup/stop.sh" # stop the cloudron code
-
-systemctl stop docker # stop the apps
-systemctl stop cloudron-installer # stop the installer
-