Fix #5637 (#5638)

src/server/api/streaming.ts

@@ -26,7 +26,7 @@ module.exports = (server: http.Server) => {
 		const subscriber = redis.createClient(
 			config.redis.port, config.redis.host);
 
-		subscriber.subscribe('misskey');
+		subscriber.subscribe(config.host);
 
 		ev = new EventEmitter();