Davis I have no idea how to do that. Do I need a virtual machine with linux? I have VirtualBox and my pc can handle it, but I haven't used composer before so it's a bit out of hand, for me. It'd be more comfortable to wait a few days (that I'd wait anyway, since the finals aren't over, for me, yet) in case someone does posts a archive with the files and sql of a system already installed, and if nobody would do that, I'll just figure it out myself.
It's just that for the people that have the stuff already installed, it's easier to just deploy another instance of flarum, but for me it would take time to figure things out, so I'm trying my luck here. It shouldn't take more than a couple of minutes, for deploying another instance of flarum, if you have the enviroment already in place, right? For me it would take a few hours to research how to install and use Composer + what linux do I need + other seemingly unimportant stuff. And that hours can be used to make the installer, instead of only figuring out how to install Flarul the way it can be installed currently.