Specify port for KubeServer

[danbopes]

Right now, it looks like it's simply scanning 3 ports:

ports = [443, 6443, 8443]

In my case, I have the API on a random higher level IP (microk8s default install chooses a port at random). There doesn't appear to be anyway I can have it ignore the 443 it finds (Which is simply an nginx server), and use the one I specify.