1. created controllers->common->chatController.js
2. created routes->userRoutes.js
ws://localhost:3000/socket.io/?EIO=4&transport=websocket&token=
40
42["message", {"text": "hello"}]
42["join_Chat",{"Chat_id":2}]

42 → Socket.IO event

join_Chat → event name

15 → Chat ID

42["send_message", {"Chat_id": 2, "content": "hello team!"}]

0	handshake
40	socket connected
42	event message
41	socket disconnected