add gem install to dockerfile

Author: David Baum

evaluationserver/Dockerfile

@@ -1,8 +1,4 @@
-FROM ruby:2.4.5
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-        rails rake build-essential nodejs default-libmysqlclient-dev mysql-client\
-    && rm -rf /var/lib/apt/lists/* && mkdir -p /usr/src/app
+FROM getaviz/evaluationserver-base:development
 WORkDIR /usr/src/app/
 COPY . .
 RUN gem update --system && gem install bundler && bundle install --jobs 20 --retry 5 && gem install bundler