Orchestration of LASR container repo

[mattgeddes]

In order to get LASR working in the managed environment, it's apparently necessary to pull and extract the node:lts-slim container image from the Docker Hub image repo. We don't want to deploy Docker as a dependency on all of the nodes, plus we want to have a barrier between pulled images and deployed images to allow for future evaluation and auditing, as well as general consistency.

This task's work items are to create an orchestration role to:

• Deploy Docker to testnet-services node
• Pull the requested images (node:lts-slim initially) from Docker Hub
• Extract the image as a tarball
• Publish the tarball over HTTP(S) for LASR nodes to pull from