FROM python:3.11-slim AS builder

WORKDIR /build

# Install build dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

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

# Runtime stage
FROM python:3.11-slim

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    libpq5 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy Python packages
COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# Copy application code
COPY . .

# Create non-root user
RUN useradd --create-home --shell /bin/bash app

USER app

EXPOSE 8000

CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]