cdnjs is a free distributed JS library delivery service.
Fathom is easy-yet-powerful website analytics that protects digital privacy.
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.
SweetAlert is a JavaScript library that provides alternative alert and modal dialog boxes for web applications, with customisable features, aiming to improve the user interface of the default browser dialogs.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.