Add contributing file (#290)

* Add contributing file

* Update CONTRIBUTING.md

Co-authored-by: stephann <[email protected]>
Signed-off-by: Cirdes <[email protected]>

* Update CONTRIBUTING.md

Co-authored-by: stephann <[email protected]>
Signed-off-by: Cirdes <[email protected]>

---------

Signed-off-by: Cirdes <[email protected]>
Co-authored-by: stephann <[email protected]>

Author: cirdes

CONTRIBUTING.md

@@ -0,0 +1,44 @@
+# Contributing to RubyUI
+
+Thank you for your interest in contributing to RubyUI! This document provides guidelines for contributing to the project.
+
+## Development Setup
+
+We recommend using the provided devcontainer to set up your development environment. This ensures a consistent environment for all contributors.
+
+1. Make sure you have Docker
+2. Clone the repository
+3. Open the project in you editor
+4. Select "Reopen in Container" if you are using VSCode or any other method to run the project
+5. The devcontainer will set up everything you need to start developing
+
+## Contribution Process
+
+1. Fork the repository
+2. Create a new branch for your changes
+3. Make your changes
+4. Run tests to ensure your changes don't break existing functionality: `bundle exec rake test`
+5. Run the linter to ensure consistent code formatting: `bundle exec rake standard`
+6. Submit a Pull Request to the main repository
+
+## Focus Areas
+
+We prioritize:
+- Improving existing components rather than adding new ones
+- Preserving the shadcn look and feel
+- Enhancing documentation
+- Fixing bugs
+
+## Code Standards
+
+We follow Standard Ruby conventions for code style. The CI pipeline runs `standard` to ensure consistent code formatting.
+
+## Testing
+
+While we don't have specific test coverage requirements, all contributions should include tests for new functionality and ensure existing tests pass.
+
+## Documentation
+
+If your changes include new components, modify how components should be used, or add new behaviors, it is highly recommended to also open a PR on the [ruby-ui/web](https://github.com/ruby-ui/web) repository. This ensures the documentation website stays up-to-date with the latest component changes.
+
+Thank you for contributing to make RubyUI better!