Implement Client-Server with Push Notifications from the Server

Hi all,
I'm working on a multiplayer card game and i want to implement a connection between multiple clients (unity) to a server (which is an asp.net server). Now i want to be able to make sure that the server is not dependent of unity and not use unity packages or something like that (i don't think i will be transporting game objects between clients).

Another thing i want to implement is a system that sends updates to all players with the current state of the game (something like signalr or grpc) but i haven't found an easy to understand system/guide that i can use.

Would love to get some advices if there is something that can help me implement the multiplayer...
Thanks

 

You can really use anything for the server and just have to choose/implement a network library. Here is a project that i'm working on for an authoritative server. Now this is an RPG game but the same principles would apply for a card game in term on communication.

https://forum.unity.com/threads/creating-an-isometric-2d-rpg-mmo-ongoing-series.998851/#post-6483664