Nick updated the coderabbitai/coderabbit-docs repository by adding a comprehensive GitHub environment variables setup reference for CodeRabbit self-hosted deployments with Chroma access. He focused on improving deployment onboarding by providing clear, security-conscious documentation that outlines explicit environment variable configuration steps. Using Markdown and applying documentation best practices, Nick ensured that the knowledge base now offers direct links and detailed setup instructions, making the self-hosted deployment process more reproducible and secure. His work demonstrated attention to integration considerations and knowledge-base maintenance, resulting in documentation that better supports users deploying CodeRabbit with Chroma in their own environments.