Deploy the ssl cert to communicate to docker hosts

In pb.csc.fi we have an ssl cert installed so that it's easy to access docker container hosts from the main machine. We should codify this in an Ansible playbook for simplicity.

@tourunen has the details.

Start by inspecting the repository's Ansible playbooks and entry points for host deployment. Ask @tourunen for the details of the existing pb.csc.fi certificate setup and Docker hosts. Done means the certificate deployment is codified in a repeatable Ansible playbook.

Written by the indexing model from the issue text.