# -------- Stage 1: base --------
FROM python:3.11-slim

# -------- Env --------
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1

# -------- System deps (minimal) --------
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    && rm -rf /var/lib/apt/lists/*

# -------- Workdir --------
WORKDIR /app

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

# -------- App --------
COPY app.py .

# -------- Non-root user --------
RUN useradd -m appuser
USER appuser

# -------- Healthcheck --------
HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
  CMD curl -f http://localhost:5000/healthz || exit 1

# -------- Run --------
CMD ["python", "app.py"]
