FROM python:3.12-slim

WORKDIR /app

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

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

COPY build/app.py build/db.py ./
COPY build/static ./static
COPY build/templates ./templates

EXPOSE 5000

HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=5 \
  CMD curl -fsS http://localhost:5000/api/health || exit 1

# gunicorn statt Flask-Devserver: mehrere Worker, robust für Dauerbetrieb
# mit ca. 40 gleichzeitig genutzten Maschinenseiten.
CMD ["gunicorn", "--workers", "4", "--threads", "2", "--timeout", "60", \
     "--bind", "0.0.0.0:5000", "app:app"]