I think I'm still missing something fundamental. The directory /var/log/shiny-server is empty so no app log info. Yet the web page I visit that should host my app says: ERROR: An error has occurred. Check your logs or contact the app author for clarification.
UPDATE
I installer Shiny Server and verified that all the files run OK using RStudio from a web browser and pointing to these files in my personal directory.
I then modified /etc/shiny-server/shiny-server.conf so that Shiny Server sees these files:
#Host the directory of Shiny Apps stored in this directory
site_dir /home/law;
Yet still when I point my browser to that directory I get the error:
ERROR: An error has occurred. Check your logs or contact the app author for clarification.
AND there are no log files to be found in /var/log/shiny-server
Thoughts?
UPDATE 2
Got it working by reinstalling all packages as the user, shiny