HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Semantic UI is a front-end development framework, powered by LESS and jQuery.
Stripe offers online payment processing for internet businesses as well as fraud prevention, invoicing and subscription management.