feat(server): gracefully close websocket connections on server shutdown

[laurentlp]

This PR makes sure to properly close the websocket server and its connections upon server shutdown.

Closes MES-132

[linear]

MES-132 Gracefully shutdown websockets connections

[samuelmasse]

I'm wondering if any of this is necessary. If we remove the http server from the Socket Server before calling close, then what does the close function do?

[laurentlp]

I'm wondering if any of this is necessary. If we remove the http server from the Socket Server before calling close, then what does the close function do?

I agree that it is kind of unnecessary, but still, it seems to be cleaner that way and doesn't add overhead. If you take a look at the definition of the server's close function, you can see that it does more than just closing the HTTP server.

[samuelmasse]

👍