remove file glob and replace with proper Dockerfile syntax

[jmontleon]

Replace the file glob in this copy command.

Per moby/moby#15858 if we have

apb-base/opt/apb/.kube/config
apb-base/opt/apb/ansible.cfg
apb-base/opt/apb/hosts

COPY opt/apb/* /opt/apb will leave us with

/opt/apb/config
/opt/apb/ansible.cfg
/opt/apb/hosts

COPY opt/apb/. /opt/apb on the otherhand will preserve the directory structure. Leaving us with what you want:

/opt/apb/.kube/config
/opt/apb/ansible.cfg
/opt/apb/hosts