FROM python:3.9-slim ARG PASSWORD WORKDIR /opt RUN apt-get update && \ apt-get install -y nano openssh-server \ gcc curl # Create ctfuser and set password RUN useradd -m -d /opt ctfuser && echo ctfuser:${PASSWORD} | chpasswd COPY src/ . # Restrict ctfuser access to only the working directory RUN chown -R ctfuser:ctfuser /opt && \ chmod 700 /opt # Configure SSH for ctfuser RUN echo "PasswordAuthentication yes" >> /etc/ssh/sshd_config && \ echo "PermitRootLogin no" >> /etc/ssh/sshd_config && \ echo "AllowUsers ctfuser" >> /etc/ssh/sshd_config # Start SSH service RUN ssh-keygen -A RUN mkdir -p /run/sshd && chmod 755 /run/sshd RUN touch /flag.txt COPY ./flag.txt /flag.txt COPY ./main.sh ./main.sh RUN pip install -r requirements.txt RUN chmod +x ./main.sh CMD service ssh start && ./main.sh # EXPOSE 5111 # EXPOSE 22