FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1

WORKDIR /app

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

COPY main.py .

RUN useradd --create-home --shell /usr/sbin/nologin appuser && \
    chown -R appuser:appuser /app

USER appuser

EXPOSE 7865

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:7865/healthz', timeout=3).read()" || exit 1

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7865"]