Update README.md

README.md

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@@ -6,8 +5,12 @@
 
 Visit [rocker-project.org](https://rocker-project.org) for more about available Rocker images, configuration, and use. 
 
+# MOVED to [`rocker-versioned2`](https://github.com/rocker-org/rocker-versioned2)
 
-## Version-stable Rocker images
+This repository contains archived build scripts from the 3.x versioned series only.  Visit  [`rocker-versioned2`](https://github.com/rocker-org/rocker-versioned2) for current build scripts for 4.x versioned images.
+
+
+## Version-stable Rocker images for R 3.x
 
 ![rocker](https://avatars0.githubusercontent.com/u/9100160?v=3&s=200)