Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
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.
PHP is a general-purpose scripting language used for web development.
Pimcore is an open-source digital platform that aggregates, enriches, and manages enterprise data and provides up-to-date, consistent, and personalised experiences to customers.
A modest JavaScript framework for the HTML you already have.