Auth for @nestjs/websockets @nestjs/platform-socket.io

[ZenSoftware]

• WebSocket implementation for ZenGateway
• Configure CORS and ensure exposure of CORS options within environment.ts
• ngx-socket-io
• Implement role-based authorization control during connection of Socket.IO. NestJS & Angular: Establish JWT secured Socket.io Realtime Connection | Realtime Chat App.
• Evaluate authorization schemes:
  • "Nest middle-ware approach" vs "Nest guard decorators".
• Test Websocket protocol with the Nest app launched into a Kubernetes cluster.