Setting Up A Websocket Gateway

# Creating a NestJS WebSocket Gateway Guide Imagine a world where your web applications don't just fetch data when you ask, but proactively *push* updates to you the moment they happen. Think live stock tickers, instant chat messages, or collaborative document editing. This isn't science fiction; it's the power of real-time communication, and at the heart of enabling it in modern web applications lies the WebSocket protocol. If you're building with NestJS, a powerful Node.js framework for build