Display app in showcase mode without source code

I would like to take advantage of Shiny's showcase mode, while only omitting the source code portion. I have my DESCRIPTION file and Readme.md file already configured, so I was hoping there was an ability to toggle just the showing of the code off. Is this possible to do?

If it is not, I see that shiny has an includeMarkdown() function that I could use for the readme. I like the layout of the showcase mode, so if there is a way to replicate it, I would be interested in that as an option as well.