This site uses the viewport meta tag which means the content may be optimized for mobile content.
Sucuri SiteCheck website security monitor is used to monitor websites for malware, blacklist status and other security issues and Sucuri CloudProxy Firewall safeguards sites and those who visit them from attacks of all kinds.
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Content Security Policy is best used as defense-in-depth, to reduce the harm caused by content injection attacks.
The http-equiv attribute provides an HTTP header for the information/value of the content attribute. The http-equiv attribute can be used to simulate an HTTP response header.