HSTS preload — алерт когда заголовок пропал после деплоя

#!/usr/bin/env bash
# Wrap as HTTP endpoint or run as a heartbeat-fed cron job.
URL="${1:-https://example.com}"
H=$(curl -sI -o /dev/null -w "%header{strict-transport-security}" "$URL")

[ -z "$H" ] && { echo "missing"; exit 1; }
echo "$H" | grep -q "preload"   || { echo "no-preload"; exit 1; }
echo "$H" | grep -q "max-age=31536000\|max-age=63072000" || { echo "max-age-low"; exit 1; }
echo "$H" | grep -q "includeSubDomains" || { echo "no-subdomains"; exit 1; }
echo "ok"