Add CONTRIBUTING.md file with guidelines for project contributions

Signed-off-by: Pete Cheslock <[email protected]>

Author: petecheslock

CONTRIBUTING.md

@@ -0,0 +1,66 @@
+# Contributing to llm-d Website
+
+Thank you for your interest in contributing to the llm-d website! This document outlines the guidelines and processes for contributing to the project.
+
+## Code of Conduct
+
+This project adheres to the llm-d [Code of Conduct and Covenant](https://github.com/llm-d/llm-d/blob/dev/CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code.
+
+## Getting Started
+
+### Community
+
+- **Slack**: Join our public discussion at [llm-d.slack.com](https://llm-d.slack.com) for immediate response and collaboration
+- **Join Slack**: You can join the [llm-d Slack at Inviter](https://inviter.co/llm-d-slack)
+- **Code**: Hosted in the [llm-d](https://github.com/llm-d) GitHub organization
+- **Issues**: Website-related bugs or issues should be reported in [llm-d/llm-d.github.io](https://github.com/llm-d/llm-d.github.io)
+
+## Contributing Process
+
+### Making Changes
+
+1. **Fork the Repository**
+   - Click the "Fork" button on the [llm-d.github.io](https://github.com/llm-d/llm-d.github.io) repository
+   - Clone your fork locally: `git clone https://github.com/YOUR-USERNAME/llm-d.github.io.git`
+
+2. **Create a Branch**
+   - Create a new branch for your changes: `git checkout -b feature/your-feature-name`
+   - Make your changes locally
+
+3. **Commit Your Changes**
+   - Stage your changes: `git add .`
+   - Commit with sign-off: `git commit -s -m "Your commit message"`
+   - Push to your fork: `git push origin feature/your-feature-name`
+
+4. **Open a Pull Request**
+   - Go to your fork on GitHub
+   - Click "New Pull Request"
+   - Select the main branch of llm-d/llm-d.github.io as the base
+   - Fill out the pull request template with details about your changes
+
+### Pull Request Preview
+
+When you open a pull request, a preview of your changes will be automatically generated and deployed. This allows reviewers to see your changes in a live environment before they are merged into the main website.
+
+- The preview URL will be posted as a comment on your pull request
+- The preview site will be automatically updated as you push new commits
+- The preview will be removed when the pull request is closed
+
+### Code Review Requirements
+
+- **All code changes** must be submitted as pull requests (no direct pushes)
+- **All changes** must be reviewed and approved by a maintainer
+- **All changes** must pass automated checks and tests
+- **Commit messages** should have:
+  - Short, descriptive titles
+  - Description of why the change was needed
+  - Enough detail for someone reviewing git history to understand the scope
+- **DCO Sign-off**: All commits must include a valid DCO sign-off line (`Signed-off-by: Name <[email protected]>`)
+  - Add automatically with `git commit -s`
+  - See [PR_SIGNOFF.md](https://github.com/llm-d/llm-d/blob/dev/PR_SIGNOFF.md) for configuration details
+  - Required for all contributions per [Developer Certificate of Origin](https://developercertificate.org/)
+
+## Questions?
+
+- For immediate help: Join [llm-d.slack.com](https://llm-d.slack.com)
+- For issues: Create an issue in [llm-d/llm-d.github.io](https://github.com/llm-d/llm-d.github.io)