Add CHANGELOG and Dockerfile - Session 2026-01-02

- Document API v5.2 changes
- Document edge_type field
- Document image cleanup and Airtable recovery
- Add Dockerfile for containerization

Dockerfile

@@ -0,0 +1,8 @@
+FROM python:3.11-slim
+WORKDIR /app
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+RUN pip install flask flask-cors psycopg2-binary gunicorn
+COPY app.py .
+EXPOSE 5000
+CMD ["gunicorn", "-w", "2", "-b", "0.0.0.0:5000", "--reload", "app:app"]