docs: designed for backend (#134)

README.md

@@ -1,6 +1,6 @@
 # Java Confidence SDK
 
-Java library for [Confidence](https://confidence.spotify.com/).
+Java library for [Confidence](https://confidence.spotify.com/). This library is designed to work in a java backend environment. For Android, please visit [Confidence-SDK-Android](https://github.com/spotify/confidence-sdk-android).
 
 ## Install
 
@@ -60,4 +60,4 @@ used to resolve feature flag values from the Confidence platform.
 
 To learn more about the basic concepts (flags, targeting key, evaluation contexts),
 the [OpenFeature reference documentation](https://openfeature.dev/docs/reference/intro) can be
-useful.
+useful.