Ruby on railsのDockerイメージ作成 - Qiita

FROM ruby:2.5 ENV LANG C.UTF-8 ENV WORKSPACE=/usr/local/src # install bundler. RUN apt-get update && \ apt-get install -y vim less && \ apt-get install -y build-essential libpq-dev && \ gem install bundler && \ apt-get clean && \ rm -r /var/lib/apt/lists/* # create user and group. RUN groupadd -r --gid 1000 rails && \ useradd -m -r --uid 1000 --gid 1000 rails # create directory. RUN mkdir -p $WORK