Run update.sh

sourcemage/README.md

@@ -14,6 +14,12 @@ WARNING:
 
 -->
 
+# **DEPRECATION NOTICE**
+
+This image is deprecated due to maintainer inactivity (last updated Dec 2016; [docker-library/official-images#2403](https://github.com/docker-library/official-images/pull/2403)).
+
+See [docker-library/docs#1433](https://github.com/docker-library/docs/pull/1433) for discussion around an in-progress upstream update.
+
 # Quick reference
 
 -	**Maintained by**: