not just Oracle should be supported, but generally please use a persistence Layer that is database vendor independend.
I see that there is hibernate involved, but still trying different databases I receive error "cannot create table this, cannot create table that"
maybe it is because of liqui* which I understand is for migration of databases. I guess that is a more complex topic.
However installing from scratch should always just work or people turn away.
It like love at first site when meeting the woman of your dreams. does not work with unbrushed teeth and skunk smell.
Otherwise it is a very impressive software once it works. great job.