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@@ -1,4 +1,12 @@
-# Docker images for performing Flutter desktop builds
+# Docker containers for performing Flutter desktop builds
+
+These docker containers are built on containers from [cirrusci](https://hub.docker.com/u/cirrusci) ([cirruslabs](https://github.com/cirruslabs)).
 
 - linux-dev is just cirrusci/flutter:dev + apt installing the needed utils
-- windows-dev is mcr.microsoft.com/dotnet/framework/sdk:4.8 and then most of a cirrusci/flutter Dockerfile on top
+- windows-dev-sdk30-fdev2.2rc is cirrusci/android-sdk:30-windowsservercore-2019 with Visual Studio 16, and Flutter dev (2.2rc)
+
+These docker containers are both being used with Drone CI to build Flutter desktop apps for Linux and Windows. Simply run `flutter build` with the appropriate OS. These containers should work with any other Docker based automated build system such as Gitlab and others.
+
+Example [.drone.yml](https://git.openprivacy.ca/flutter/flutter_app/src/branch/trunk/.drone.yml)
+
+If you find these containers useful, please consider [donating to Open Privacy Research Society](https://openprivacy.ca/donate/) as it takes work to assemble and maintain our containers and we're a small org. :)