fix: add Dockerfile, document future tree-sitter support

[tcconnally]

Closes #45, #46.

[pr-flyer]

Note: PR Pilot suggested approval, but automated approval is disabled until changes are verified in a sandbox. Posting as a comment for human review.

🤖 PR Pilot Review

🔍 Reviewer (Agent 1)

The PR introduces a Dockerfile for future local analysis capabilities and updates the README accordingly. The Dockerfile is a good start, but it could be improved by following security and build optimization best practices.

📋 Issues Found

• [LOW] security — The Docker container runs as the root user by default. It is a security best practice to run containers as a non-root user to limit the potential impact of a container compromise. (Dockerfile:14)
• [LOW] performance — The Docker build context may include unnecessary files and directories (e.g., .git, .venv, __pycache__), which can increase build time and layer size. (Dockerfile)

🔧 Fixer (Agent 2)

Fixed Docker security and performance issues by adding a non-root user and a .dockerignore file.

🧪 Tester (Agent 3)

The changes in this pull request are to a Dockerfile and README.md. These are configuration and documentation files, respectively, and do not contain any testable application logic. Therefore, no tests were generated.

✅ Verifier (Agent 4)

Verified the generated patches for Dockerfile security and performance improvements. The patch to add a non-root user is correct and addresses the security concern. The creation of a .dockerignore file is also correct and will optimize the build process. No tests were generated, which is acceptable for these types of changes.

🚀 Decision: AUTO APPROVE

All checks passed. This PR is safe to merge.

Pipeline duration: ~130.7s

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Review by PR Pilot — AI-native code quality service