FROM python:3.12-slim

WORKDIR /app

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

COPY app.py .
COPY templates/ templates/

ENV PYTHONUNBUFFERED=1
EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --retries=3 --start-period=30s \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8000/').close()" || exit 1

CMD ["gunicorn", "-b", "0.0.0.0:8000", "-w", "2", "--access-logfile", "-", "app:app"]