Genuinely curious, how would you implement something like a cron web interface? Certainly it would require you to have a program execute a shell command upon some HTTP request. Granted this project focuses on displaying data but there are many, many serious web libraries that execute commands on the server depending on what the person is trying to do.
Think of all the libraries that are just abstraction layers to imagemagick or ffmpeg. Do you really think there no legitimite use case for executing commands via some web program?