Dockerfile

FROM python:3.10-slim

# Install deps
RUN pip install --no-cache-dir flask requests gunicorn

WORKDIR /app

# Copy code and default image
COPY app.py    /app/app.py
COPY default.png /app/default.png

EXPOSE 7860

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