Dockerfile

FROM elixir:latest

WORKDIR /app

RUN apt-get update
RUN apt-get install -y tmux

ADD http://s3.amazonaws.com/s3.hex.pm/installs/1.1.0/hex-0.15.0.ez /tmp/
RUN mix archive.install --force /tmp/hex-0.15.0.ez

RUN mix local.hex --force

RUN apt-get update && apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:root' | chpasswd
RUN sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config

RUN grep -q "ChallengeResponseAuthentication" /etc/ssh/sshd_config && sed -i "/^[^#]*ChallengeResponseAuthentication[[:space:]]yes.*/c\ChallengeResponseAuthentication no" /etc/ssh/sshd_config || echo "ChallengeResponseAuthentication no" >> /etc/ssh/sshd_config
RUN grep -q "^[^#]*PasswordAuthentication" /etc/ssh/sshd_config && sed -i "/^[^#]*PasswordAuthentication[[:space:]]yes/c\PasswordAuthentication no" /etc/ssh/sshd_config || echo "PasswordAuthentication no" >> /etc/ssh/sshd_config
RUN service ssh restart

# SSH login fix. Otherwise user is kicked off after login
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

ENV NOTVISIBLE "in users profile"
RUN echo "export VISIBLE=now" >> /etc/profile

EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]