reader: add reference to the JavaScript client.

Change-Id: I4d8daa29b8eb1ff3a4592fbcc7d67ef491e127bb
diff --git a/README.md b/README.md
index 05fc01c..3b5727f 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,11 @@
 An example multi-device PDF reader built using Vanadium on both the native
 Android and Flutter.
 
-All apps exchange information using Syncbase.  Details of the various projects
-can be found in their respective directories.
+All apps exchange information using
+[Syncbase](https://vanadium.github.io/syncbase).
+Details of the various projects can be found in their respective directories.
+
+
+NOTE: A web client of Reader was also developed, but it is no longer maintained.
+The latest source code of the web client can be found
+[here](https://github.com/vanadium/reader/tree/beefcfa2b55b5ea648b17ce9077c264c85747db2/web).