Dockerfile in arstotzka-1.4.4 vs Dockerfile in arstotzka-1.5.0

@@ -1,7 +1,7 @@
-FROM darthjee/ruby_gems:0.2.3 as base
-FROM darthjee/scripts:0.1.2 as scripts
+FROM darthjee/rails_gems:0.5.3 as base
+FROM darthjee/scripts:0.1.8 as scripts
 
 ######################################
 
 FROM base as builder
 
@@ -14,17 +14,11 @@
 #######################
 #FINAL IMAGE
 FROM base
 RUN mkdir lib/arstotzka -p
 
-USER root
+COPY --chown=app:app --from=builder /home/app/bundle/ /usr/local/bundle/
 
-COPY --chown=app:app --from=builder /home/app/bundle/gems /usr/local/bundle/gems
-COPY --chown=app:app --from=builder /home/app/bundle/cache /usr/local/bundle/cache
-COPY --chown=app:app --from=builder /home/app/bundle/specifications /usr/local/bundle/specifications
-COPY --chown=app:app --from=builder /home/app/bundle/bin /usr/local/bundle/bin
-COPY --chown=app:app --from=builder /home/app/bundle/extensions /usr/local/bundle/extensions
-
 COPY --chown=app ./*.gemspec ./Gemfile /home/app/app/
 COPY --chown=app ./lib/arstotzka/version.rb /home/app/app/lib/arstotzka/
-USER app
+
 RUN bundle install