docs: add contributing guidelines and project philosophy

This adds a CONTRIBUTING.md file to provide guidance for potential contributors while
acknowledging the project's personal origins. The document establishes expectations
about response times, explains how to contribute effectively, and sets standards
for community interaction. It emphasizes that while the project began as a personal
tool, community contributions are welcome and appreciated.

Author: nanoninja

.github/CONTRIBUTING.md

@@ -0,0 +1,89 @@
+# Contributing to Docker Nginx PHP MySQL
+
+First of all, thank you for considering contributing to this project! It started as a personal tool, and I've been pleasantly surprised by its popularity and adoption in the community. This makes your interest in contributing all the more appreciated.
+
+## Important Note
+
+This project was initially created for personal use, and while I'm delighted that many developers find it useful, I may not always be able to respond quickly to issues or pull requests due to other commitments. I apologize in advance for any delays in my responses.
+
+## How to Contribute
+
+Despite the above caveat, contributions are very welcome! Here are some ways you can help improve this project:
+
+### Reporting Bugs
+
+If you find a bug, please create an issue on GitHub with:
+
+- A clear, descriptive title
+- A detailed description of the problem
+- Steps to reproduce the issue
+- Expected and actual behavior
+- Screenshots if applicable
+- Your environment details (OS, Docker version, etc.)
+
+### Suggesting Enhancements
+
+Ideas to improve the project are always welcome. When suggesting an enhancement:
+
+- Provide a clear description of what you're suggesting
+- Explain why this would be valuable to users
+- If possible, outline how it could be implemented
+
+### Pull Requests
+
+Pull requests are the best way to propose changes:
+
+1. Fork the repository
+2. Create your feature branch: `git checkout -b feature/amazing-feature`
+3. Make your changes
+4. Update the documentation to reflect your changes
+5. Commit your changes: `git commit -m 'Add some amazing feature'`
+6. Push to the branch: `git push origin feature/amazing-feature`
+7. Open a pull request
+
+#### Guidelines for Pull Requests
+
+- Keep changes focused on a single issue
+- Follow the existing code style
+- Include tests if applicable
+- Update documentation as needed
+- Ensure all tests pass
+- Reference any relevant issues
+
+## Development Setup
+
+Please refer to the README.md for instructions on setting up the development environment.
+
+## Code of Conduct
+
+### Our Pledge
+
+In the interest of fostering an open and welcoming environment, we pledge to make participation in our project a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+### Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior include:
+
+- The use of sexualized language or imagery and unwelcome sexual attention or advances
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or electronic address, without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a professional setting
+
+### Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+## License
+
+By contributing to this project, you agree that your contributions will be licensed under the same license as the original project.
+
+Thank you for contributing!