Please be aware, that most Synology Diskstations are below the recommended specification. It depends on your use case: Roon offers some cpu intensive features, such as audio upsampling, room correction and other digital signal processing tasks. If you would like to use these features, stream to multiple zones simultaneously or have a large library, the CPU of your diskstation might not be powerful enough.
If you are unsure, if your diskstation is capable of handling your setup, the best way to ensure this, to just give it a try.
Roon Labs hardware recommendation can be read here.