Merge pull request #312 from terraform-google-modules/contributing

Add contributing file

CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contributing
+
+We welcome any contributions on bugs, or feature requests you would like to submit!
+
+The basic process is pretty simple:
+
+* Fork the Project
+* Create your Feature Branch<br>`git checkout -b feature/AmazingFeature`
+* Commit your Changes<br>`git commit -m 'Add some AmazingFeature`
+* Make sure Terraform linting is ok (hint: `terraform format`)
+* Make sure tests pass!<br>`pytest # in the root folder`
+* Make sure any changes to variables and outputs are reflected in READMEs<br>`./tools/tfdoc.py [changed folder]`
+* Push to the Branch<br>`git push origin feature/AmazingFeature`
+* Open a Pull Request
+
+When implementing your new feature, please follow our [core design principles](./MANIFESTO.md#core-design-principles).