Update web build and web-specific components; RNW now builds

index.web.js

@@ -0,0 +1,13 @@
+// index.web.js
+
+import {AppRegistry} from 'react-native'
+import App from './src/App'
+import {name as appName} from './src/app.json'
+
+// register the app
+AppRegistry.registerComponent(appName, () => App)
+
+AppRegistry.runApplication(appName, {
+  initialProps: {},
+  rootTag: document.getElementById('app-root'),
+})