update readme

README.md

@@ -1,8 +1,10 @@
 # Zone for Hacker News
 
-Zone is yet another Hacker News client, built with [Flutter], [Slidy], and [HNPWA API].
+![Build release](https://github.com/wuuzw/zone/workflows/Build%20release/badge.svg)
 
-![home page][home]
+Zone is yet another Hacker News client, built with [Flutter], [Slidy], and [Hacker News API].
+
+![screenshot][screenshot]
 
 ## Setup
 Clone this repo to your machine
@@ -33,6 +35,6 @@ Please make sure to update tests as appropriate.
 
 [Flutter]: https://flutter.dev/
 [Slidy]: https://github.com/Flutterando/slidy
-[HNPWA API]: https://pub.dev/packages/hnpwa_client
+[Hacker News API]: https://hackerwebapp.com/
 [Apache License 2.0]: LICENSE
-[home]: screenshots/screenshot_1.png
+[screenshot]: screenshots/screenshot_1.png