Dockerfile

FROM ruby:2.3.4
RUN apt-get update && apt-get install -y libssh2-1-dev tree git zsh libssh2-1 zlib1g-dev vim cmake && apt-get clean
RUN useradd -m appuser && su - appuser -c 'ssh-keygen -t rsa -N "" -f /home/appuser/.ssh/id_rsa' && mkdir /app \
    && chown appuser:appuser /app
COPY ./Gemfile* /app/
COPY .bash_profile /home/appuser/.bash_profile
RUN su - appuser -c 'git config --global user.email "user@example.com"' && \
    su - appuser -c 'git config --global user.name "Example User"' && \
    chown -R appuser:appuser /home/appuser/ && \
    chown -R appuser:appuser /app && \
    gem install gitlab rugged
RUN su - appuser -c "BUNDLE_PATH=/home/appuser/.bundle GEM_HOME=/home/appuser/.gems bundle install --gemfile=/app/Gemfile" \
    && rm -f /app/*
# update PATH to find local gems

USER appuser