Quickstart guide: Adding more steps for manually downloaded images
Quickstart guide: Adding more steps for manually downloaded images

Signed-off-by: Lalatendu Mohanty <51e26f8eb794e7391b5ea8128d9ade5c4c5ae20b@redhat.com>

bexelbie/centos7-container-app-vagrant-box,bexelbie/centos7-container-app-vagrant-box