Upgrade Context to let you upgrade your site to latest version easily, and also you can backup and restore you site in this command.
upgrade backupParameters: TBD
e.g:
upgrade backupthis command will backup you site and db to a zip file and give out the file link so that you can save it to your local computer.
upgrade checke.g:
upgrade checkthis command will check whether there is a new version your application can upgrade to.
