Dockerfile

FROM python:3.10-slim

WORKDIR /app

RUN apt-get update && apt-get install -y \
    build-essential \
    curl \
    stockfish \
    && rm -rf /var/lib/apt/lists/*

RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR $HOME/app

COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

COPY --chown=user . .

EXPOSE 7860

HEALTHCHECK CMD curl --fail http://localhost:7860/ || exit 1

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