FROM python:3.9-slim

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

# Create a non-root user for security (optional but good practice, though HF Spaces runs as user 1000 usually)
# For simplicity, running as root in container is fine for this demo, 
# but we need to ensure port 7860 is exposed.
EXPOSE 7860

CMD ["python", "app.py"]