oCIS with WOPI on local network

Hi, I followed the deployment examples for oCIS and WOPI and locally it is working nicely and I think its a great product. Now I wish to access from my local network but it is not obvious to the layman how to do that. In the .env file I can set OCIS_DOMAIN= or any other service’ domain to the server IP and then access that particular service from the network, but thats it. I dont have access to the router so all changes would have to be made on the server.