Adding a contributing.md file

CONTRIBUTING.md

@@ -0,0 +1,24 @@
+# Contribution Guidelines
+
+Thank you for your interest in contributing to this project!
+To facilitate your contributions, we've outlined a brief set
+of guidelines to ensure that your extensions can be easily integrated.
+
+## Git Branches
+
+The main branch corresponds to the most recent version of the project.
+
+When contributing to the project, please make sure that your Pull Request (PR)
+contains the following:
+
+- Detailed description of the changes performed
+- Corresponding changes to documentation and sample environments (if
+  applicable)
+- Summary of the tests performed to validate your changes
+- Issue numbers that the PR resolves (if any)
+
+## Contributor License Agreements
+
+When you open a pull request, you will be asked to acknowledge our Contributor
+License Agreement. We allow both individual contributions and contributions made
+on behalf of companies. We use an open source tool called CLA assistant.