FROM python:3.11-slim

# Environment safety
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Workdir
WORKDIR /app

# System deps (minimal)
RUN apt-get update && apt-get install -y \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first (cache friendly)
COPY requirements.txt .

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

# Copy app code
COPY . .

# Expose port
EXPOSE 5001

# Run with gunicorn (PRODUCTION)
# CMD ["gunicorn", "-w", "2", "-b", "0.0.0.0:5001", "app:app"]
CMD ["python", "app.py"]