Dockerfile

FROM python:3.9-slim

WORKDIR /app

RUN useradd -m -u 1000 user
COPY --chown=user . /app
RUN pip install --no-cache-dir flask gunicorn

USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

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