update the Contributing section

Based on feedback from @craigez and @willbar  Thanks!

README.md

@@ -106,9 +106,9 @@ Note that the dashboard does not report queue message rates (top right graph) wh
 
 # Contributing
 
-The project team is more than happy to take contributions and suggestions.
+This project welcomes contributions and suggestions.  Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.  
 
-To start working, run `npm install` in the repository folder to install the required dependencies. See the usage section for pointers on how to run.
+When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.  
 
 This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.