Update CONTRIBUTING.md

Contributing guidelines updated.

CONTRIBUTING.md

@@ -1 +1,17 @@
-Please clone the repo, craete a feature branch and submit a PR once is ready to be integrated :)
+# Contribute to the caddy-waf project!
+
+You can contribute in many ways:
+
+1. Testing the solution in different contexts and provide useful feedback.
+2. Writing WAF rules and submitting a PR. Contribution rules must be saved to the `rules` folder.
+3. Improving the documentation.
+4. Opening an issue.
+5. Improving the whole codebase, if something really big please provide additional context.
+
+You already know the right way to submit a PR :)
+
+- Clone the repository locally.
+- Create a dedicated feature branch for your changes.
+- Ensure your Pull Request (PR) passes all existing tests before submission.
+
+Please note:  I am actively developing and adding more tests to ensure comprehensive coverage.  Your PR must pass the current test suite.  Thank you for your contributions!