update gem

Author: David Baum

evaluationserver/Dockerfile

@@ -6,6 +6,7 @@ RUN apt-get update \
 RUN mkdir -p /usr/src/app
 WORkDIR /usr/src/app/
 COPY . .
+RUN gem update --system
 RUN gem install bundler && bundle install --jobs 20 --retry 5 # might be better?
 RUN gem install bundler
 LABEL maintainer="[email protected]" \