add production-build notice to readme

README.md

@@ -89,6 +89,13 @@ react-native link react-native-image-crop-picker
 - [Optional] If you want to use camera picker in your project, add following to `AndroidManifest.xml`
   - `<uses-permission android:name="android.permission.CAMERA"/>`  
 
+#### Production build
+
+##### iOS
+
+If you are using pre-built frameworks from `ios/ImageCropPickerSDK`, then before deploying app to production you should strip off simulator ARCHs from these, or you can add frameworks from `Libraries/imageCropPicker/Libraries/_framework_name_.xcodeproj/Products/_framework_name_.framework` to Embedded Binaries instead of pre-built ones.
+Related issue: https://github.com/ivpusic/react-native-image-crop-picker/issues/61.
+
 ## How it works?
 
 It is basically wrapper around few libraries