add brief info about using goa V2 in this project

Author: Roberto Sora

README.md

@@ -2,6 +2,16 @@
 arduino-create-agent
 ====================
 
+## GOA 2 refactoring
+The agent is currently transitioning to the v2 of the GOA framework for API management, please refer to the following 
+[documentation](https://github.com/goadesign/goa/tree/v2) in order to install tools and libraries
+
+
+i.e. to regenerate code from design use:
+```bash
+goa gen github.com/arduino/arduino-create-agent/design
+```
+
 ## Installation
 Get the latest version of the Agent for all supported platforms:
 
@@ -459,4 +469,4 @@ By making a contribution to this project, I certify that:
 
 ## Creating a release
 Just create a new release on GitHub, and our drone server will build and upload
-the compiled binaries for every architecture in a zip file in the release itself.
+the compiled binaries for every architecture in a zip file in the release itself.