Varnish is a reverse caching proxy.

Amazon Application Load Balancer (ALB) distributes incoming application traffic to increase availability and support content-based routing.

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.

Amazon S3 or Amazon Simple Storage Service is a service offered by Amazon Web Services (AWS) that provides object storage through a web service interface.

Amazon Web Services (AWS) is a comprehensive cloud services platform offering compute power, database storage, content delivery and other functionality.

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

WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.

MySQL is an open-source relational database management system.

PHP is a general-purpose scripting language used for web development.

WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.

WP Rocket is a caching and performance optimisation plugin to improve the loading speed of WordPress websites.

Yoast SEO is a search engine optimisation plugin for WordPress and other platforms.

Yoast SEO Premium is a search engine optimisation plugin for WordPress and other platforms.

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