add end-of-life notification

README.md

@@ -2,7 +2,11 @@
 [![npm](https://img.shields.io/npm/v/webfuse.svg)](https://npmjs.com/package/webfuse)
 
 # webfuse-js
-Webfuse JavaScript Provider
+Webfuse JavaScript Provider.
+
+**Note:** This repository refers to [webfuse-legacy](https://github.com/falk-werner/webfuse/tree/webfuse-legacy).
+Since `webfuse-legacy` is out-dated, the repository is archived and will be removed in future.  
+_Please leave an issue if you are still interested in this code._
 
 ## Fellow Repositories