Adding necessary info for go/releasing (#6)

Author: mkruskal-google

CONTRIBUTING.md

@@ -0,0 +1,32 @@
+# How to Contribute
+
+This repository is currently a WIP, forked from
+[rules_ruby](https://github.com/bazelruby/rules_ruby) for use in building and
+testing Ruby [Protobuf](https://github.com/protocolbuffers/protobuf).
+
+TODO(mkruskal): Fill in automated testing procedure.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement (CLA). You (or your employer) retain the copyright to your
+contribution; this simply gives us permission to use and redistribute your
+contributions as part of the project. Head over to
+<https://cla.developers.google.com/> to see your current agreements on file or
+to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code Reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+## Community Guidelines
+
+This project follows
+[Google's Open Source Community Guidelines](https://opensource.google/conduct/).

LICENSE

@@ -186,7 +186,8 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2018-2021 BazelRubyContributors.
+   Copyright 2022 Google LLC
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.