Kerberos authentication on dask gateway deployed on AKS

Is it possible to use Kerberos authentication on a dask gateway deployed on AKS? The documentation says that the FQDN is the fully qualified domain name of the host running dask-gateway-server. But when deployed on AKS, the FQDN can change. What FQDN should we use in that scenario?

```bash
# Create the HTTP principal (if not already created)
$ kadmin -q "addprinc -randkey HTTP/FQDN"

# Create a keytab
$ kadmin -q "xst -norandkey -k /etc/dask-gateway/http.keytab HTTP/FQDN"
```