FROM ruby:2.7 # Edit with nodejs, mysql-client, postgresql-client, sqlite3, etc. for your needs. # Or delete entirely if not needed. RUN apt-get update \ && apt-get install -y --no-install-recommends \ nodejs \ postgresql-client \ && rm -rf /var/lib/apt/lists/* # throw errors if Gemfile has been modified since Gemfile.lock RUN bundle config --global frozen 1 WORKDIR /usr/src/app COPY Gemfile Gemfile.lock /usr/src/app/ RUN bundle install -j $(nproc) COPY . /usr/src/app # For Sinatra #EXPOSE 4567 #CMD ["ruby", "./config.rb"] # For Rails EXPOSE 3000 CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0"]