JavaScript.com is a free online resource for learning JavaScript and staying up-to-date with the latest news, frameworks, and libraries. It's developed in Node.js on DigitalOcean, using CloudFlare as a caching layer to offload traffic from its application servers. The site uses HAProxy load balancers to distribute traffic between multiple servers, with NGINX and Phusion Passenger managing Node processes. A PostgreSQL database handles data storage, with a hot spare server available for read-only access. SaltStack is used for configuration management and scaling out horizontally by spinning up new servers quickly and automatically through DigitalOcean. The site's architecture allows it to scale independently as traffic increases, making it ready to handle a large amount of traffic.