Can I use the network name instead of IP range to define controller network?

Rather than reserve a specific network range i think it would be much more straightforward to be able to configure the caddy controller something like this:

```
      - CADDY_CONTROLLER_NETWORK_NAME=caddy-controller
...
networks:
    caddy-controller:
        internal: true
```
Is this possible? It should then be able to figure out the range automatically.