Update README.md

Author: cloudwebrtc

README.md

@@ -1,8 +1,11 @@
 # flutter-webrtc-server
 A simple WebRTC Signaling server for flutter-webrtc and html5.
 
-## Compatible browser
-Chrome/Firefox/Safari
+## Features
+- Support Windows/Linux/macOS
+- Built-in web, signaling, [turn server](https://github.com/pion/turn/tree/master/examples/turn-server)
+- Support [REST API For Access To TURN Services](https://tools.ietf.org/html/draft-uberti-behave-turn-rest-00)
+- Use [flutter-webrtc-demo for](https://github.com/cloudwebrtc/flutter-webrtc-demo) all platforms.
 
 ## Usage