FROM debian:buster-slim ARG APP_ID=1000 RUN apt-get update && apt-get install -y ssh RUN groupadd -g "$APP_ID" app \ && useradd -g "$APP_ID" -u "$APP_ID" -d /var/www -s /bin/bash app RUN echo 'app:app' | chpasswd RUN service ssh start EXPOSE 22 CMD ["/usr/sbin/sshd","-D"]