Are you seeing any performance issues you are trying to fix? Usually tweaking swap behavior on linux is only useful for dedicated very well known use-case and even then the kernel might do as it likes in the end, broadly speaking.
Cloudron adds some swap space to avoid cases where otherwise the system as a whole might become unstable. Just having free swap does not even always prevent out-of-memory cases on linux and the kernel might still kill processes, regardless of free swap.
Given that Cloudron is such a generic system with various different technologies with their own memory management on top of all that (think of javascript or ruby engines), I would not spend any time trying to optimize this, usually it becomes worse.
Also note that even if swap space is used, this does not necessarily mean those memory pages are already removed from RAM, it may just that the system has some idle times and thinks offloads some rarely used memory pages i advance, even if that might never be required in the end.
That being said if you say have to pay for disk I/O then this might be a reason to reduce swappiness, though also that is a bit of a hint mostly.
