HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
phpBB is a free open-source Internet forum package in the PHP scripting language.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.
Yandex.Metrica is a free web analytics service that tracks and reports website traffic.