Dockerfile

# syntax=docker/dockerfile:1.4
ARG PYTHON_VERSION=3.13

############################
# 1. Builder stage: build wheels
############################
FROM python:${PYTHON_VERSION}-slim AS builder

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    gcc \
    g++ \
    libpq-dev \
    libffi-dev \
    libssl-dev \
    libjpeg-dev \
    zlib1g-dev \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app
COPY requirements.txt .

# Build wheels
RUN pip install --upgrade pip setuptools wheel \
 && pip wheel --no-cache-dir --wheel-dir=/wheels \
    --prefer-binary \
    -r requirements.txt

############################
# 2. Runtime stage: install wheels, copy code
############################
FROM python:${PYTHON_VERSION}-slim AS runtime

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

# Install runtime dependencies (for packages like psycopg2)
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy built wheels and requirements.txt
COPY --from=builder /wheels /wheels
COPY requirements.txt .


# Install from wheels, clean up
RUN pip install --upgrade pip setuptools \
 && pip install --no-index --find-links=/wheels -r requirements.txt \
 && rm -rf /wheels

# Copy your application code
COPY . .


# Add entrypoint script
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh

# Use entrypoint to run migrations before starting app
ENTRYPOINT ["/entrypoint.sh"]

EXPOSE 8000
CMD ["gunicorn", "backend.wsgi:application", "--bind", "0.0.0.0:8000"]