Angie is a drop-in replacement for the Nginx web server aiming to extend the functionality of the original version.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Svelte is a free and open-source front end compiler created by Rich Harris and maintained by the Svelte core team members.