How do I connect to local signal server?

I have extremely bad internet 144kb connection so using the standard

"wss://multiplayer.scirra.com" as a signal server isn't the best for testing as many times it just straight up fails to connect at all.

Is there a way I can locally connect to a signal server?

buy one of these scirra.com/store/game-making-tools/multiplayer-signalling-server-161 and host it locally and connect to it instead of scirra's servers