Update docs/source/contributing/contributing.md
@@ -22,6 +22,12 @@ There are many ways to contribute to repo2docker:
We know that there are lots of ways to extend repo2docker!
If you're interested in adding a feature then please open a [feature request](https://github.com/jupyter/repo2docker/issues/new?template=feature_request.md).
That issue template will ask you a few questions described in detail below.
+* **Review someone's Pull Request.**
+ Whenever somebody proposes changes to the repo2docker codebase, the community reviews
+ the changes, and provides feedback, edits, and suggestions. Check out the
+ [open pull requests](https://github.com/jupyter/repo2docker/pulls?q=is%3Apr+is%3Aopen+sort%3Aupdated-desc)
+ and provide feedback that helps improve the PR and get it merged. Please keep your
+ feedback positive and constructive!
* **Tell people about repo2docker.**
As we said above, repo2docker is built by and for its community.
If you know anyone who would like to use repo2docker, please tell them about the project!
