Deploying Knot.x with Starter-Kit approach

[malaskowski]

Describe the solution you'd like
Starter-kit can build a Docker image. However, there are no examples or guidelines how to deal with Knot.x when deploying it in form of a Docker container. The questions are:

• How to build a knotx-based application so that it is ready to be deployed on Docker Swarm or Kubernetes.
• How to separate application and environment-specific configuration.
• How to validate the image and its logic before deploying.

Additional context
One of ideas is to do a series of examples with tutorials, on how to deploy Knot.x instance on swarm/k8s clusters, how to deal with configuration and how to separate it form the application.