Dockerfile

# Supported base (Debian Bookworm) – no EOL repos
FROM python:3.11-slim-bookworm

# Python behavior
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

# System deps (drop version pins)
# If you use psycopg2-binary, you can remove build-essential/libpq-dev/pkg-config.
RUN apt-get update && apt-get install -y --no-install-recommends \
      build-essential \
      libpq-dev \
      pkg-config \
      dnsutils \
    && rm -rf /var/lib/apt/lists/*

# App dir
WORKDIR /app

# Install Python deps first (layer cache)
COPY requirements.txt .
RUN python -m pip install --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy project
COPY . /app

# Django port (adjust if different)
EXPOSE 8000

# Run DB migrations at container start (not at build time)
# Assumes manage.py is at /app/manage.py and wsgi module is pygoat.wsgi
CMD ["sh", "-c", "python manage.py migrate && gunicorn --bind 0.0.0.0:8000 --workers 6 pygoat.wsgi"]