Seafile production install script — change data directory

I was about to install Seafile on a freshly created LXC container using the official production script on github (seafile-server-installer) however, I tried to append -h or --help to the command to see if the script accepted some configuration. I found none.

If I want to point the data directory a different path other than the default (/opt/seafile) do I have to go through the manual installation or is there a way to accomplish this with the script?