FROM ruby:slim as base WORKDIR /usr/src RUN apt update &&\ apt install --yes git curl build-essential whois RUN curl -sL https://deb.nodesource.com/setup_current.x | bash - &&\ apt-get update && \ apt-get install --yes --no-install-recommends nodejs &&\ npm install -g yarn \ apt-get clean RUN gem install rails # RUN gem install rails CMD ["bash"]