Dockerfile in cloud-mu-3.1.3 vs Dockerfile in cloud-mu-3.1.4

@@ -2,20 +2,28 @@
 
 RUN mkdir -p /opt/mu/etc/ /home/mu /usr/local/ruby-current/lib/ruby/gems/2.5.0/gems/var/
 
 WORKDIR /home/mu
 
+RUN df -h
+
 RUN apt-get update
 
 RUN apt-get install -y ruby2.5-dev dnsutils ansible build-essential
 
 RUN apt-get upgrade -y
 
+RUN df -h
+
 COPY ./cloud-mu-*.gem /home/mu
 
-RUN gem install ./cloud-mu-*.gem thin -N
+RUN gem install ./cloud-mu-*.gem -N
 
-RUN rm cloud-mu-*.gem
+RUN df -h
+
+RUN ls -la
+
+#RUN rm --verbose -f cloud-mu-*.gem
 
 RUN apt-get remove -y build-essential ruby2.5-dev
 
 RUN apt-get autoremove -y