fix: add Dockerfile, document future tree-sitter support

Dockerfile

@@ -0,0 +1,15 @@
+# Blast Radius Agent — multi-stage Docker image
+FROM python:3.12-slim AS base
+WORKDIR /app
+
+# Install orbit CLI (if available)
+# RUN curl -sSL https://gitlab.com/gitlab-org/orbit/-/releases/permalink/latest/downloads/orbit-linux-amd64 -o /usr/local/bin/orbit && chmod +x /usr/local/bin/orbit
+
+COPY pyproject.toml .
+RUN pip install --no-cache-dir .
+
+COPY blast_radius/ ./blast_radius/
+COPY skills/ ./skills/
+
+ENTRYPOINT ["python", "-m", "blast_radius"]
+CMD ["--help"]

README.md

@@ -131,6 +131,26 @@ blast-radius-agent/
     └── thumbnail.png            # Architecture diagram thumbnail
 ```
 
+
+
+## Future: GitHub + Local Support
+
+Blast Radius currently requires GitLab Orbit for code graph data. Tree-sitter support
+is planned (see [#45](https://github.com/tcconnally/blast-radius-agent/issues/45))
+to enable analysis on any codebase without GitLab:
+
+- Walk local file tree with tree-sitter
+- Extract symbol definitions and references
+- Build in-memory graph matching the Orbit contract
+- Works on GitHub, Bitbucket, and local-only repos
+
+### Docker
+
+```bash
+docker build -t blast-radius .
+docker run blast-radius src/myfile.py --function main
+```
+
 ## License
 
 MIT — see [LICENSE](LICENSE)