Document requirement regarding docker compose v2

Change-Id: I50bc3015786d9dd320658b16a4576eef010ae417
diff --git a/Readme.md b/Readme.md
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 ## Requirements
 
 Install [docker](https://www.docker.com/) and
-[docker compose](https://github.com/docker/compose).
+[docker compose](https://github.com/docker/compose) (>= v2).
 
 
 ## Starting