Dockerfile in concourse-resource-rubygems-0.3.2 vs Dockerfile in concourse-resource-rubygems-0.3.3

@@ -1,5 +1,6 @@
 FROM gems/concourse-fuselage
 
-RUN gem-install concourse-resource-rubygems
+RUN apk-install ca-certificates \
+    && gem-install concourse-resource-rubygems
 
 RUN find $(gem environment gemdirs) -type f -path '*/concourse-resource-rubygems-*/bin/*' -exec ln -s '{}' \;