How to push notifications (and server responses) to my WebGL game?

Hello, I am relatively new to developing in Unity. I have a WebGL game that polls my server for data, but I want to switch it so that my server can push the data to my game. Does anyone have any recommendations or examples on how to solve this problem?

My server is hosted in AWS Lambda and fronted by REST APIG. I was thinking maybe I could make something work by leveraging SNS or perhaps Websocket APIG, but am not really sure if either is feasible.

Thank you!

 

I was successfully able to leverage AWS' API Gateway WebSockets in my WebGL game: https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-websocket-api-overview.html