HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.
PHP is a general-purpose scripting language used for web development.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.
WPML plugin makes it possible to build and run fully multilingual WordPress sites.
Yoast SEO is a search engine optimisation plugin for WordPress and other platforms.