FROM python:3.9-slim

WORKDIR /app

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

COPY . .

# Create a writable directory for data persistence (if mounted)
# In HF Spaces, we can write to /app, but for persistence usually a dataset is better.
# For this demo, local file is fine (it resets on restart unless persistent storage is configured in HF).
RUN chmod -R 777 /app

EXPOSE 7860

CMD ["gunicorn", "-b", "0.0.0.0:7860", "app:app"]