FROM ubuntu RUN apt update && apt install tree nano openssh-server sudo -y RUN useradd -rm -d /home/ubuntu -s /bin/bash -g root -G sudo -u 1000 test RUN echo 'test:test' | chpasswd RUN service ssh start RUN mkdir -p /home/ubuntu/playground COPY assets/ /home/ubuntu/playground/ EXPOSE 22 # Start the OpenSSH server CMD ["/usr/sbin/sshd", "-D"]