Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.

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.

WebSocket is a communication protocol that provides full-duplex communication channels over a single, long-lived connection, enabling interactive communication between web browsers and servers.

Vercel is a cloud platform for static frontends and serverless functions.

Amazon CloudFront is a fast content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency, high transfer speeds.

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

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

Varnish is a reverse caching proxy.

jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.

Cloudflare Browser Insights is a tool that measures the performance of websites from the perspective of users.

Tailwind is a utility-first CSS framework.

jQuery CDN is a way to include jQuery in your website without actually downloading and keeping it your website's folder.

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