Add production Jenkins release pipelines

scripts/deploy/maintenance-status.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+MAINTENANCE_FILE="${GENARRATIVE_MAINTENANCE_FILE:-/var/lib/genarrative/maintenance/enabled}"
+
+if [[ -f "${MAINTENANCE_FILE}" ]]; then
+  echo "[maintenance] enabled"
+  cat "${MAINTENANCE_FILE}"
+else
+  echo "[maintenance] disabled"
+fi