Sample Nest JS app to test Server-Sent Events (SSE) to push unidirectional notifications to UI from API layer without Websockets.

• UI will subscribe to the Server-Sent Events (SSE) endpoint on the NestJS layer on page load for the specified user id in URL (?userId=2).
• A corn scheduler is setup on the Nest JS layer for every 2 seconds which will emit message to a random user id.
• The SSE connection will be destroyed on page unload.

        $ git clone https://github.com/tamdilip/sse-nest-js.git
        $ cd sse-nest-js
        $ npm start
        $ Visit in Browser -> http:https://localhost:3000/?userId=2