Update README.md (#114)

README.md

@@ -1,3 +1,8 @@
+# This project is now archived
+
+This project is no longer under active maintenance. It is read-only, but you can still clone or fork the repo. [Check here for further info](https://docs.github.com/en/repositories/archiving-a-github-repository/archiving-repositories).
+Please contact innereye_info@service.microsoft.com if you run into trouble with the "Archived" state of the repo.
+
 # Introduction
 
 InnerEye-Inference is an App Service webapp in python to run inference on medical imaging models trained with the [InnerEye-DeepLearning toolkit](https://github.com/microsoft/InnerEye-Inference).