Subscribe `bw serve` to notifications for auto-updating on changes

I have a problem that the running bw serve service does not auto-update on changes.
So, I have to make /sync call every several seconds to keep my db up to date, which makes a lot of unnecessary load to the server.

Please implement subscribing of the bw serve to notifications for auto-updating the database on changes, to get rid of manual syncs.

If this is already possible now, please describe how to configure it.