update rubygems

firefart · firefart · commit 4b272f309be0 · 2017-08-28T17:14:46.000+02:00
diff --git a/Dockerfile b/Dockerfile
@@ -36,6 +36,7 @@ RUN apk update && \
       ncurses-dev \
       git \
     && echo "gem: --no-ri --no-rdoc" > /etc/gemrc \
+    && gem update --system \
     && gem install bundler \
     && bundle install --system $BUNDLER_ARGS \
     && apk del .ruby-builddeps \
