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 requirements.txt app.py ./
RUN pip install --no-cache-dir -r requirements.txt

ENV PORT=8080
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD curl -f "http://127.0.0.1:${PORT}/health" || exit 1

CMD ["sh", "-c", "gunicorn --bind 0.0.0.0:${PORT} --workers 2 --threads 4 app:app"]