# Production image for the Django backend.
# Runs migrations then serves the app with gunicorn on port 8000.
# Static files are collected at build time into /app/staticfiles and
# served by the backend itself behind the host nginx reverse proxy.

FROM python:3.11-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    DJANGO_SETTINGS_MODULE=backend.settings

WORKDIR /app

RUN apt-get update \
    && apt-get install -y --no-install-recommends gcc \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip \
    && pip install --no-cache-dir -r requirements.txt gunicorn

COPY . .

RUN python manage.py collectstatic --noinput

EXPOSE 8000

CMD ["sh", "-c", "python manage.py migrate --noinput && exec gunicorn backend.wsgi:application --bind 0.0.0.0:8000 --workers 3"]