Accessing Universe database outside docker container

I am running an api in a docker container on windows server 2019. My api has to communicate with the database which is not on docker. I have following questions in this regard.

  1. How can we enable our container to communicate outside docker host? - database is not on same machine (but on same LAN).
  2. Since it is a flat file database, accessed through Universe (Rocket software), will it cause any blockage in what I am trying to achieve?

It appears docker doesn’t have support for Universe database, so image cannot be created. Is there any other way we an enable communication without an image?