Some options are:
* `authbind`, a tool to allow non-root processes to bind to low numbered ports <
* `setcap`, to give process only the capability it needs What are the different ways to set file permissions etc on gnu/linux
* port forwarding: run it as normal user on port 8080, but forward port 80 <
* `docker`: run in docker, and have docker forward port 80 to the jboss container.