* adding Operational Considerations section
modified: docs/getting-started-guides/ubuntu/logging.md
* Moving logging section from operational-considerations.md to logging.md
renamed: docs/getting-started-guides/ubuntu/operations.md -> docs/getting-started-guides/ubuntu/operational-considerations.md
* mapping to the proposed name
* ditched CDK naming in favor of k8s or cluster
* add whitelines for titles