Update Dockerfile with main.py copy

- Ensure both Dockerfile and Dockerfile.gpu include latest main.py
- Picks up all syntax fixes for production deployment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -24,6 +24,7 @@ RUN mkdir -p /data /app/models /app/knowledge_db /data/huggingface/hub /data/hug
 
 # Copy test interface (needed for /test endpoint)
 COPY test_interface.html /app/
+COPY main.py /app/
 
 EXPOSE 8000
 CMD ["python", "main.py"]