20.3.1 Deploying your app-package - clarity on directory

[thomaszwagerman]

Thank you for Mastering Shiny!

This is more a comment on the wording of the workflow of the following section:

On first reading, "You'll need an app.R that..." is confusing because in a previous step you create an app.R within the R/ folder. As a user this made me think "ah I've already got one of those." I think this sentence needs to specify that this app.R should be in the package's main folder.