FROM ruby:2.5.1 ENV LANG=C.UTF-8 WORKDIR /devdocs RUN apt-get update && \    apt-get -y install git nodejs && \    gem install bundler && \    rm -rf /var/lib/apt/lists/* COPY Gemfile Gemfile.lock Rakefile /devdocs/ RUN bundle install --system && \    rm -rf ~/.gem /root/.bundle/cache /usr/local/bundle/cache COPY . /devdocs RUN thor docs:download --all && \    thor assets:compile && \    rm -rf /tmp EXPOSE 9292CMD rackup -o 0.0.0.0