Dockerfile

FROM python:3.12-slim AS builder

WORKDIR /app

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

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

RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

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


FROM python:3.12-slim AS runner

WORKDIR /app

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PATH="/opt/venv/bin:$PATH"

# pango/harfbuzz/fontconfig are WeasyPrint's text stack, and without a real font
# package every PDF falls back to a substitute face.
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    dumb-init \
    libpango-1.0-0 \
    libpangoft2-1.0-0 \
    libharfbuzz0b \
    libfontconfig1 \
    fonts-dejavu-core \
    && rm -rf /var/lib/apt/lists/*

COPY --from=builder /opt/venv /opt/venv

COPY . .

RUN python manage.py collectstatic --noinput

RUN chmod +x entrypoint.sh

EXPOSE 8000

ENTRYPOINT ["dumb-init", "--", "./entrypoint.sh"]
CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]