HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Preline UI is an open-source set of prebuilt UI components based on the utility-first Tailwind CSS framework.
SPIP is a content management system written in PHP that uses one or more databases like SQL, SQLite or PostgreSQL.