Document CONTRIBUTING (#92)

To minimize the amount of uncertainty a new contributor feels when
contributing to the project.

CONTRIBUTING.md

@@ -0,0 +1,62 @@
+# Contributing
+
+First, thank you for contributing!
+
+We love pull requests from everyone. By participating in this project, you
+agree to abide by the thoughtbot [code of conduct].
+
+[code of conduct]: https://thoughtbot.com/open-source-code-of-conduct
+
+Here are a few technical guidelines to follow:
+
+1. Open an [issue][issues] to discuss a new feature.
+1. Write tests.
+1. Make sure the entire test suite passes locally and on CI.
+1. Open a Pull Request.
+1. [Squash your commits][squash] after receiving feedback.
+1. Party!
+
+[issues]: https://github.com/houndci/hound/issues
+[squash]: https://github.com/thoughtbot/guides/tree/master/protocol/git#write-a-feature
+
+## Configure Hound Linters on Your Local Development Environment
+
+
+After you have cloned this repo, run this setup script to set up your machine
+with the necessary dependencies to run and test this app:
+
+```sh
+% bin/setup
+```
+## Linters
+### Writing a Linter
+
+See Hound's [CONTRIBUTING] documentation for further details.
+
+[CONTRIBUTING]: https://github.com/houndci/hound/blob/master/CONTRIBUTING.md#writing-a-linter
+
+## Deploying
+If you have previously run the `bin/setup` script, you can deploy to staging
+and production with:
+
+```sh
+% bin/deploy staging
+% bin/deploy production
+```
+
+## Contributor License Agreement
+
+If you submit a Contribution to this application's source code, you hereby grant
+to thoughtbot, inc. a worldwide, royalty-free, exclusive, perpetual and
+irrevocable license, with the right to grant or transfer an unlimited number of
+non-exclusive licenses or sublicenses to third parties, under the Copyright
+covering the Contribution to use the Contribution by all means, including but
+not limited to:
+
+* to publish the Contribution,
+* to modify the Contribution, to prepare Derivative Works based upon or
+  containing the Contribution and to combine the Contribution with other
+  software code,
+* to reproduce the Contribution in original or modified form,
+* to distribute, to make the Contribution available to the public, display and
+  publicly perform the Contribution in original or modified form.

README.md

@@ -21,11 +21,7 @@ This service uses the following linters:
   * [credo](https://github.com/rrrene/credo) for Elixir
   * [reek](https://github.com/troessner/reek) for Ruby code smells
 
-## Getting Started
-
-After you have cloned this repo, run this setup script to set up your machine
-with the necessary dependencies to run and test this app:
-
-    % ./bin/setup
+To contribute to the Linters codebase, see the [CONTRIBUTING.md] file.
 
+[CONTRIBUTING.md]: CONTRIBUTING.md
 [Hound]: https://github.com/houndci/hound