How to expose my http router url to web socket , to use subscription

Help
1

How to expose my http router url to web socket , to use subscription
I am using docker FROM Package router · GitHub
and enabled subscription in router.yml but its not working and not able to crete web socket url

2

Clients connecting to the router for subscriptions must the HTTP multipart transport, not web sockets. The router can use web sockets to connect to subgraphs, but the router doesn’t expose its own web socket server.

All of the Apollo client libraries support this transport, and Apollo Client (TypeScript) also provides adapters for urql and Relay.

3

Hi Dylan
If I configure the web socket internal url in apollo studio config for the specific subgraph its working but not with my router url where normal queries and mutation working