add shenyan-app RN project + PWA push/noise updates

shenyan-app/index.js

@@ -0,0 +1,9 @@
+/**
+ * @format
+ */
+
+import { AppRegistry } from 'react-native';
+import App from './src/App';
+import { name as appName } from './app.json';
+
+AppRegistry.registerComponent(appName, () => App);