Create CONTRIBUTING.md

Author: Code-Hex

CONTRIBUTING.md

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+## How to contribute to github.com/Code-Hex/vz
+
+#### **Did you find a bug?**
+
+* **Ensure the bug was not already reported** by searching on GitHub under [Issues](https://github.com/Code-Hex/vz/issues).
+
+* If you're unable to find an open issue addressing the problem, [open a new one](https://github.com/Code-Hex/vz/issues/new). Be sure to include a **title and clear description**, as much relevant information as possible, and a **code sample** or an **executable test case** demonstrating the expected behavior that is not occurring.
+
+#### **Did you write a patch that fixes a bug?**
+
+* Open a new GitHub pull request with the patch.
+
+* Ensure the PR description clearly describes the problem and solution. **Must** be included the relevant issue number.
+
+> **Note**
+> We generally do not accept a series of pull requests that are either very bad code or harassing.
+
+#### **Did you fix whitespace, format code, or make a purely cosmetic patch?**
+
+Changes that are cosmetic in nature and do not add anything substantial to the stability, functionality, or testability of github.com/Code-Hex/vz will generally not be accepted.
+