Dockerfile

# syntax=docker/dockerfile:1
FROM ruby:2.7
RUN apt-get update -qq && apt-get install -y postgresql-client
RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - &&         \
  curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
  echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
  apt-get update && apt-get install -y nodejs yarn

WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install && yarn install


# install foreman to run webpack-dev-server in parallel
RUN gem install foreman

# Add a script to be executed every time the container starts
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000

# configure the main process to run when running the image
CMD ["foreman", "start"]