!!!it works now with 8088!!! but i did try that earlier by changing the manually in the web browser from 8080-to-8088 and it didn't work.
I think I know what was the problem:
when I tried originally it did not work even when I manually changed the port 8080-to8088 in the browser after trying the WEBUI. I believe the reason for that was that i was trying the container without the VPN config file being placed into the ovpn folder.
Now, it works with the default port 8080 which I just changed in the config.
Now, it works with only one network in the LAN_NETWORK 192.168.0.0/24
Verdict - it needs to have a valid ovpn config in order to run. It seems there is no need to change the default port.
@binhex, @wgstarks, Thanks for all your patience and help.