Add CONTRIBUTING.md

Author: nikhita

CONTRIBUTING.md

@@ -0,0 +1,11 @@
+# Contributing
+
+Thanks for taking the time to join our community and start contributing!
+
+The [Contributor Guide](https://github.com/kubernetes/community/blob/master/contributors/guide/README.md)
+provides detailed instructions on how to get your ideas and bug fixes seen and accepted.
+
+Please remember to sign the [CNCF CLA](https://github.com/kubernetes/community/blob/master/CLA.md) and
+read and observe the [Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md).
+
+Instructions for testing and deploying the publishing bot exist [here](README.md#testing-and-deploying-the-robot).

README.md

@@ -61,6 +61,10 @@ This will not push to your org, but runs in dry-run mode. To run with a push, ad
 
 **Caution:** Make sure that the bot github user CANNOT close arbitrary issues in the upstream repo. Otherwise, github will close, them triggered by `Fixes kubernetes/kubernetes#123` patterns in published commits.
 
+## Contributing
+
+Please see [CONTRIBUTING.md](CONTRIBUTING.md) for instructions on how to contribute.
+
 ## Known issues
 
 1. Testing: currently we rely on manual testing. We should set up CI for it.