HTTPヘッダ情報チェック
| HTTP/1.1 200 OK | |
| Server | nginx/1.20.1 |
| Date | Wed, 18 Mar 2026 21:15:58 GMT |
| Content-Type | text/html; charset=utf-8 |
| Content-Length | 27396 |
| Connection | keep-alive |
| X-Frame-Options | SAMEORIGIN |
| Pragma | no-cache |
| Cache-control | no-store |
| Strict-Transport-Security | max-age=31536000; includeSubDomains; preload |