Consider reading this documentation section before trying to install in your host https://docs.openkm.com/kcenter/view/ok ... ebian.html, I suppose sinology is a NAS server. Really the NAS servers have not been thought to storage application, have been thought to share files.
Can OpenKM be installed there? yes
I suggest installing this kind of servers? not a good idea from my point of view.
I suppose Sinology will come with a Linux, and the installation will be similar as you do with almost Linux. Here the third party software ( take a look at the bottom of the website documentation I shared ) it is the most difficulties to get 100% application features working. Maybe you do not need everything?