sticking point - a point at which an impasse arises in progress toward an agreement or a goal. detail, item, point - an isolated fact that is considered separately from the whole; several of the details are similar; a point of information. Translations.
Nginx is an open source HTTP Web server and reverse proxy server. Pronounced as âEngine-Ex,â Nginx has emerged as the third most popular Web server behind the Apache Web server and Microsoftâs IIS, and it currently powers popular websites like Pinterest, WordPress.com, Netflix, Hulu, CloudFlare, Zappos and Zynga.
As others have said, nginx is a web server, like Apache. It can be used, same as Apache, to serve websites. You could see that message if you just happened to be trying to visit a lot of nonexistent pages at websites that happened to be using nginx, but that seems a bit unlikely, as Apache is a lot more common.