Sorry the source is in russian, but that's rather important.<p>Additional information (both in russian):
<a href="https://habr.com/ru/company/itsumma/blog/479942" rel="nofollow">https://habr.com/ru/company/itsumma/blog/479942</a>
<a href="https://roem.ru/12-12-2019/281134/rambler-nginx/" rel="nofollow">https://roem.ru/12-12-2019/281134/rambler-nginx/</a>