FROM ruby:2.5.1
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev
RUN mkdir /app
WORKDIR /app
COPY Gemfile /app/Gemfile
COPY Gemfile.lock /app/Gemfile.lock
RUN bundle install
COPY . /app
EXPOSE 3000
CMD bundle exec rails s -p 3000 -b '0.0.0.0'