FROM python:3.11-slim
WORKDIR /app

RUN apt-get update && apt-get install -y sqlite3 && rm -rf /var/lib/apt/lists/*

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

COPY src ./src
RUN mkdir -p /app/data

# non-root
RUN useradd -r -s /bin/false botuser && chown -R botuser:botuser /app
USER botuser

# healthcheck: open/close DB
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD python -c "import sqlite3; sqlite3.connect('/app/data/blackjack.db').close()" || exit 1

CMD ["python", "-m", "src.bot"]