Add CONTRIBUTING.md file with guidelines for project contributions (#52)

* Add CONTRIBUTING.md file with guidelines for project contributions

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

* Refactor contributing guidelines in CONTRIBUTING.md and README.md

- Streamlined the contributing process by consolidating instructions and removing outdated sections.
- Updated the pull request preview and code review requirements for clarity.
- Enhanced links for community support and issue reporting.

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

---------

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

Author: petecheslock

CONTRIBUTING.md

@@ -0,0 +1,3 @@
+# Contributing to llm-d Website
+
+Thank you for your interest in contributing to the llm-d website! This project adheres to the llm-d [Contributing Guidelines](https://github.com/llm-d/llm-d/blob/dev/CONTRIBUTING.md). 

README.md

@@ -13,8 +13,6 @@ If you spot any errors or ommisions in the site, please open an issue at [github
 3. Fork the website repo and deploy a preview version of your proposed change for reviewers to check. This will make obvious any missed links from step 2
 
 
-
-
 ### Installation
 
 ```
@@ -29,26 +27,50 @@ $ npm start
 
 This command starts a local development server and opens up a browser window. Most changes are reflected live without having to restart the server.
 
-<!-- ### Build
+### Making Changes
 
-```
-$ yarn build
-```
+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`
 
-This command generates static content into the `build` directory and can be served using any static contents hosting service.
+2. **Create a Branch**
+   - Create a new branch for your changes: `git checkout -b feature/your-feature-name`
+   - Make your changes locally
 
-### Deployment
+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`
 
-Using SSH:
+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
 
-```
-$ USE_SSH=true yarn deploy
-```
+### Pull Request Preview
 
-Not using SSH:
+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.
 
-```
-$ GIT_USER=<Your GitHub username> yarn deploy
-```
+- 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?
 
-If you are using GitHub pages for hosting, this command is a convenient way to build the website and push to the `gh-pages` branch. -->
+- For immediate help: Join [llm-d.slack.com](https://llm-d.slack.com) -> [Invite Link](https://inviter.co/llm-d-slack)
+- For issues: Create an issue in [llm-d/llm-d.github.io](https://github.com/llm-d/llm-d.github.io)