FROM python:3.9-slim

WORKDIR /app

# Install ping utility and procps for the lab environment
RUN apt-get update && \
    apt-get install -y --no-install-recommends iputils-ping procps && \
    rm -rf /var/lib/apt/lists/*

RUN pip install flask

RUN echo "RENAD{CVE_2026_21877_RCE_ROOT_ACCESS}" > /root/flag.txt 

COPY network_monitor.py .

EXPOSE 5000

CMD ["python", "-u", "network_monitor.py"]