Dockerfile

FROM ruby:2.4.5
RUN apt-get update -qq && apt-get install -y \
  build-essential \
  libpq-dev \
  nodejs \
  libgmp3-dev \
  postgresql-client-9.6
RUN mkdir /myapp
WORKDIR /myapp
EXPOSE 3000
COPY . /myapp
RUN bundle install
CMD ["bundle", "exec", "puma", "-p", "3000"]