During the deployments when
hot_deploy
isn't enabled you see the default503
page of the Apache Server. This cartridge will replace this page with another one which is much more user friendly :)
rhc cartridge add https://raw.githubusercontent.com/webuildsg/openshift-cartridge-maintenance-page/master/metadata/manifest.yml -a <appname>
To customize the 503 page, you can edit the 503.html
here.