When creating a KOTS application, you can make use of template functions. If you want to know which template functions or fields are available out-of-the-box, you can go to the Template Functions Reference.
Don’t know which context a field is in? How about trying a google search specific on the reference doc. For example, if you’re looking for the version of the application, you can search the kots.io site for:
site:https://kots.io/reference/template-functions/ version
And you’ll see that VersionLabel is exactly what you need 
