Notice about archiving this repo.

The contents have been copied to the dockerfiles repo.

README.md

@@ -5,6 +5,10 @@
 A Docker image for a portable working environment, meant to be used with
 [Toolbox](https://github.com/containers/toolbox).
 
+This image is now maintained in the [dockerfiles
+repo](https://git.shore.co.il/shore/dockerfiles/-/tree/master/workbench).
+Please follow that as this repo is now archived.
+
 ## Usage
 
 ```