Create CONTRIBUTING

Based on rails contribution text

CONTRIBUTING

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+How to contribute to tooll.io
+============
+
+Did you find a bug?
+--------
+* **Ensure the bug was not already reported** by searching on GitHub under [Issues](https://github.com/framefield/tooll/issues).
+
+* If you're unable to find an open issue addressing the problem, [open a new one](https://github.com/framefield/tooll/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.
+
+* For more detailed information on submitting a bug report and creating an issue, visit our [reporting guidelines](https://github.com/framefield/tooll/wiki/How-to-Submit-Bugs).
+
+#### **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. Include the relevant issue number if applicable.
+
+* Before submitting, please read the [Contributing to Ruby on Rails](https://github.com/framefield/tooll/wiki/Contribute) guide to know more about coding conventions and benchmarks.
+
+
+</br>
+Tooll is a volunteer effort. We encourage you to join the team!
+
+Thanks! :heart: :heart: :heart:
+
+Toollinos