Execution should be sandboxed

[llewelld]

A student could submit code that does nasty things (either intentionally or unintentionally) and currently there's nothing that will stop it.

The two obvious solutions would be to set the Java security profile to restrict what the program can do, or execute the program in a Docker container.

[llewelld]

This code be helpful as an introduction: https://www.digitalocean.com/community/tutorials/docker-explained-how-to-containerize-python-web-applications