Dockerfile in yopass-3.0.0 vs Dockerfile in yopass-3.0.1

@@ -1,12 +1,10 @@
 FROM ruby:2
 RUN apt-get update
 RUN apt-get install libsasl2-dev
-RUN gem install thin --no-rdoc --no-ri
 
-
 # Replace with gem install yopass
 ADD . /yopass
 WORKDIR /yopass
 RUN bundle install
 EXPOSE 3000
-CMD ["thin", "start"]
\ No newline at end of file
+CMD ["thin", "start"]