shiny-server

site_dir: Locations with both apps and static assets

The new site_dir directive configures a location to serve up a directory
on disk that can contain subdirectories, static assets, and Shiny apps.
The Shiny app directories can be arbitrarily nested in subdirectories and
must have .shiny as a suffix of the directory name.

Any files located anywhere underneath a *.shiny directory are blocked
from being served statically (except through the Shiny app itself, i.e.
appdir/www).

Any URLs with *.shiny as a path element are rejected, as a security
precaution.