Upgraded to Rails 6.0.1

deploy/rails-dev-Dockerfile

@@ -18,6 +18,7 @@ RUN echo "America/New_York" > /etc/timezone \
 
 RUN echo 'gem: --no-rdoc --no-ri' > /root/.gemrc
 RUN gem install bundler
+RUN gem update --system
 ADD Gemfile* /tmp/
 WORKDIR /tmp
 RUN bundle install --jobs 4 --without production

deploy/rails-prod-Dockerfile

@@ -26,6 +26,7 @@ RUN apt-get -qq update \
 
 RUN echo 'gem: --no-rdoc --no-ri' > /root/.gemrc
 RUN gem install bundler
+RUN gem update --system
 #Cache gems so they don't install on every code change
 RUN rm -rf /rails && mkdir /rails
 WORKDIR /rails