Improved readme (#23079)
Link to CONTRIBUTING.md in the flutter_tools README
diff --git a/packages/flutter_tools/README.md b/packages/flutter_tools/README.md
index b6d6543..75b2bba 100644
--- a/packages/flutter_tools/README.md
+++ b/packages/flutter_tools/README.md
@@ -2,6 +2,9 @@
Tools for building Flutter applications.
+Be sure to follow the instructions on
+[CONTRIBUTING.md](../../CONTRIBUTING.md) to setup.
+
To run the tests, ensure that no devices are connected,
then navigate to `flutter_tools` and execute:
