Dockerfile

FROM ruby:2.6

# throw errors if Gemfile has been modified since Gemfile.lock
RUN bundle config --global frozen 1
RUN gem install bundler:1.16.6

WORKDIR /usr/src/app

COPY Gemfile Gemfile.lock ./
RUN bundle install

COPY . .

RUN bundle exec rake init

EXPOSE 4000

CMD ["bundle", "exec", "jekyll", "serve", "--host", "0.0.0.0"]