How to access Gitlab from another machine

Hi All,
I am a new user to Gitlab. I have installed virtual box (version : 5.2.8) on my windows 10 machine and created Ubuntu machine (version of Ubuntu: 18.04.3 LTS). Then I installed Gitlab package (gitlab-ce_12.6.0-ce.0_amd64.deb) on this Ubuntu machine.
I am able to access gitlab on this Ubuntu machine, How to access this gitlab from another (client) machine? I have tried to access by using url of this Ubuntu machine, but failed to access it.
Please guide me the further steps.
Thanks in advance.

I think you’ll need to setup port forwarding in virtual box