Redirect Port 80 web site

I have a system installed and that normally operates with the ip: 8069. The objective is to create a website in a virtual machine of the type www.dominio.com, which by accessing it loads the application ip: 8069, we have tried the following without success

|OS type and version:|Ubuntu 18.04
|Webmin version: 1.981
|Virtualmin version: 6.17-3
|Related products version:|RECOMMENDED|

What have you tried?