update according to reviewer suggestion
update according to reviewer suggestion

Signed-off-by: Liu Lantao <76a6660fe9fefc267f44f514e5df31fcc12a6493@gmail.com>

thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io