Dockerfiles

Top level container images used in MQube services. We should probably get rid of these and use image caching layers instead.

Adding a new container image

1. Create a folder containing the Dockerfile you wish to use in the root of the repository. The name of this folder will become the name of the generated image.
2. In /.lighthouse/jenkins-x/ copy one of the existing folders and rename it to the name of image.
3. Change the environment variable IMAGE_NAME in pr.yaml & release.yaml to be the name of the image.
4. Open a PR with your changes.