Adding CODEOWNERS

CODEOWNERS

@@ -0,0 +1,4 @@
+# For more information, see [docs](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#codeowners-syntax)
+
+# This repository is maintained by: 
+* @rdietrick @cloudyjohnny @gfarb