To install Greenstone3 as a service, operating as the user www-data, run:

./INSTALL-SERVICE.sh

This script checks a few things first, and if all is well, goes ahead and
creates the greenstone3.service file (in this folder), and then installs
it.

It finishes by printing out some extra details, such as how to use the
service with 'systemctl', including how to add it in to the boot-up
sequence.