Elm-UI is a library for creating user interfaces in Elm programming language. It provides a set of functions and abstractions for building responsive and reusable UI components, such as buttons, forms, and layouts, in a declarative and type-safe way.
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.