Improve NodeNorm deployment

[gaurav]

The current instructions might be out of date, and only talk about loading NodeNorm directly from the JSON files, rather than loading them from a Redis backup of the NodeNorm databases (which is what most end-users will want).

What would be best is:

• The user installed Redis (either locally, in a Docker image, or on a remote server)
• There was a Python script in this repo that checked the Redis instance to ensure that the databases it needed to create did not exist, downloaded the Redis backup files from RENCI Stars, restored them into the Redis database, and then checked to make sure the numbers were correct.
  • Maybe two scripts: one for downloads, one for uploads
  • We could put them into NodeNorm-loading and then eventually get those steps out of translator-devops