Hotjar is a suite of analytic tools to assist in the gathering of qualitative data, providing feedback through tools such as heatmaps, session recordings, and surveys.
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.
PHP is a general-purpose scripting language used for web development.
Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.