Create CONTRIBUTING.md

Signed-off-by: Glenn ten Cate <[email protected]>

Author: blabla1337

CONTRIBUTING.md

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+# Contributing to the Cybersecurity Skills Framework
+
+Thank you for your interest in contributing to the Cybersecurity Skills Framework! This project is part of the Open Source Security Foundation (OpenSSF) and follows the Linux Foundation's community standards.
+
+## Ways to Contribute
+
+We welcome contributions of all kinds, including:
+
+- Proposing or refining job role definitions
+- Suggesting improvements to skill descriptions
+- Translating or localizing the framework
+- Contributing UI/UX enhancements or bug fixes
+- Creating educational resources or mappings to standards
+- Opening issues and participating in discussions
+
+## Getting Started
+
+1. **Fork the Repository**
+   - Navigate to the [GitHub repository](https://github.com/ossf/cybersecurity-skills-framework)
+   - Click on the "Fork" button
+
+2. **Clone Your Fork**
+```
+git clone https://github.com/your-username/cybersecurity-skills-framework.git
+cd cybersecurity-skills-framework
+```
+
+3. **Create a Branch**
+```
+git checkout -b my-feature-branch
+```
+
+Make Changes & Commit
+```
+git commit -am "Add my contribution"
+```
+
+Push & Open a Pull Request
+```
+git push origin my-feature-branch
+```
+
+Then go to GitHub and open a new pull request.
+
+4. **Filing Issues**
+
+If you find a bug or have an idea, please open an issue and provide as much detail as possible.
+   - Clearly describe the problem or enhancement
+   - Include screenshots, examples, or standards if relevant
+   - Propose a solution if you have one
+
+5. **Code of Conduct**
+
+All contributors are expected to follow the Linux Foundation Code of Conduct.
+
+6. **License**
+
+By contributing, you agree that your contributions will be licensed under:
+   - Apache License 2.0 for software
+   - CDLA for data
+   - Creative Commons Attribution 4.0 for documentation