To keep the DNS lookup local on your own network, you would need to maintain a separate local reverse proxy. That can be used to drive the Pangolin proxy though by just using the domain name defined in the local proxy since the newt instance is checking your local domain on the reverse side.
That way you don’t need to use IP addresses in your pangolin instance and can use domains defined by your local proxy.
To keep the DNS lookup local on your own network, you would need to maintain a separate local reverse proxy. That can be used to drive the Pangolin proxy though by just using the domain name defined in the local proxy since the newt instance is checking your local domain on the reverse side.
That way you don’t need to use IP addresses in your pangolin instance and can use domains defined by your local proxy.