Varnish is a reverse caching proxy.

Fastly is a cloud computing services provider. Fastly's cloud platform provides a content delivery network, Internet security services, load balancing, and video & streaming services.

GitHub Pages is a static site hosting service.

Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.

Drupal is a free and open-source web content management framework.

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.

Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.

Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.

Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside a web browser.

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.