Fix kube config

[djzager]

The files/opt/apb/.kube/config file was being copied to /opt/apb/config...that will not work. This change puts the kubeconfig where it belongs (in /opt/apb/.kube/config) and removes the COPY statements from the nightly dockerfile since we just installed apb-base-scripts.

Proof the new one works:

$ docker run -it --rm --privileged --net=host --entrypoint /bin/cat docker.io/djzager/apb-base:new /opt/apb/.kube/config
apiVersion: v1
clusters:
- cluster:
    certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
    server: https://kubernetes.default:443
  name: kubernetes
contexts:
- context:
    cluster: kubernetes
    user: apb-user
  name: /kubernetes/apb-user
current-context: /kubernetes/apb-user
kind: Config
preferences: {}
users:
- name: apb-user
  user:
    tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token

Proof the old one was broken:

$ docker run -it --rm --privileged --net=host --entrypoint /bin/cat docker.io/djzager/apb-base:old /opt/apb/.kube/config
/bin/cat: /opt/apb/.kube/config: No such file or directory

Proof that nightly works after removing the COPY statements:

$ docker run -it --rm --privileged --net=host --entrypoint /bin/cat docker.io/djzager/apb-base:nightly /opt/apb/.kube/config
apiVersion: v1
clusters:
- cluster:
    certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
    server: https://kubernetes.default:443
  name: kubernetes
contexts:
- context:
    cluster: kubernetes
    user: apb-user
  name: /kubernetes/apb-user
current-context: /kubernetes/apb-user
kind: Config
preferences: {}
users:
- name: apb-user
  user:
    tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token

# Just checking permissions.  
$ docker run -it --rm --privileged --net=host --entrypoint /bin/bash docker.io/djzager/apb-base:nightly
bash-4.2# ls -lhat /opt/apb/.kube
total 12K
drwxrwxr-x. 1 apb root 4.0K Dec 19 13:58 ..
drwxrwxr-x. 1 apb root 4.0K Dec 19 13:58 .
-rwxrwxr-x. 1 apb root  437 Dec 15 15:40 config
bash-4.2#

[jmontleon]

ACK