Create CONTRIBUTING.md (#597)

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+# Contributing to OpenFE
+
+Thanks for contributing to the OpenFE software project!
+Read our [code of conduct](../Code_of_Conduct.md) to understand the standards you must adhere to.
+
+## Questions
+
+If you have any questions on using the OpenFE package, reach out on the "Discussions" tab above to start a conversation!
+We are happy to get you started in using our software.
+
+## Issues
+
+If you think you have encountered a software issue, please raise this on the "Issues" tab in Github.
+In general the more details you can provide the better, 
+we recommend reading section 3.3 of [this article](https://livecomsjournal.org/index.php/livecoms/article/view/v3i1e1473)
+to understand the problem solving process.
+
+## Contributing
+
+We welcome any fixes or code contributions.
+Note that any contributions made must be made under a MIT license.
+Feel free to reach out to the developer team who can assist you in this process.