I tried this a while ago.
You first need a postgresql server on a computer with access to the LAN and WAN.
Important here is that the PSQL version must match the one installed by Resolve.
The make sure there’s no firewall block outside access to the PSQL server (port 5432).
Once all that is running, anyone should be able to connect to your database and
projects created by Resolve. (And anything else in the database so take a close look
at how to secure your DB with accounts and passwords on the postgresql website!!!)
I haven’t tested this thoroughly, just got it to work.
I’ll be setting this up in a bug environment soon though.
greets
Arno