Make multiplayer work with HTTPS

[SerSquirt]

When you use Batwaves on a web browser, multiplayer does not work unless you use HTTP. Using HTTPS doesn't work with multiplayer.

[MarkSort]

ok, we need some way to set a certificate here so that it will use https for the websocket

batwaves/godot/Networking/Server.gd

Line 18 in bc7f13b

server.listen(1337)