Проверка сервера HTTP - TROUBLESHOOTING.RU

> HTTP/1.1 200 OK
> Server: nginx
> Date: Tue, 19 Jan 2021 01:43:07 GMT
> Content-Type: text/html
> Transfer-Encoding: chunked
> Connection: close
> Vary: Accept-Encoding
> Expires: Thu, 01 Jan 1970 00:00:01 GMT
> Cache-Control: no-cache
> Cache-Control: no-store, no-cache, must-revalidate
> Pragma: no-cache