FROM python:3.13-slim

WORKDIR /app

RUN apt-get update && apt-get install -y --no-install-recommends tzdata && rm -rf /var/lib/apt/lists/*

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

COPY . .

ENV DB_PATH=/data/science_grades.db
ENV PYTHONUNBUFFERED=1

EXPOSE 5050

HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:5050/login')" || exit 1

CMD ["gunicorn", "--bind", "0.0.0.0:5050", "--workers", "1", "--threads", "8", "--timeout", "120", "--access-logfile", "-", "--error-logfile", "-", "wsgi:app"]