fix(dockerfile): Fix error running jekyll in docker (#1661)
fix(dockerfile): Fix error running jekyll in docker (#1661)


spinnaker/spinnaker.github.io,spinnaker/spinnaker.github.io,spinnaker/spinnaker.github.io,ttomsu/spinnaker.github.io,ttomsu/spinnaker.github.io,ttomsu/spinnaker.github.io