Update the config hostname to allow an array of strings for CORS

server/src/types/config.d.ts

@@ -9,7 +9,7 @@ interface config {
 	webserver: {
 		enabled: boolean;
 		port: number;
-		hostname: string;
+		permitted_hosts: string | string[];
 	};
 	game: {
 		hand_size: number;

server/src/websocket.ts

@@ -12,7 +12,7 @@ export default async (conf: config) => {
 
 	io.listen(conf.websocket.port, {
 		cors: {
-			origin: conf.webserver.hostname,
+			origin: conf.webserver.permitted_hosts,
 			credentials: true,
 		}
 	});