Dockerfile

FROM python:3.8-slim-buster

ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PORT=7860 \
    DATABASE_URL=sqlite:////data/db.sqlite3

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    python3-dev \
    curl \
    libsqlite3-dev \
    && rm -rf /var/lib/apt/lists/* \
    && mkdir -p /data /static \
    && chmod 777 /data /static

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

COPY . .

# Build-time static collection with dummy settings
RUN python manage.py collectstatic --noinput --settings=dtb.settings_build

COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh

CMD ["/entrypoint.sh"]