Docker Image Update

[adamjk-dev]

Another suggestion would be to consider getting a newer Docker base image and/or updating the version of Python and NodeJS.

The base image used for this container:
https://github.com/SilentNotaryEcosystem/Cil-core/blob/master/Dockerfile#L1

The upstream image is a year old and NodeJS 10 has its own issues:
https://hub.docker.com/layers/nikolaik/python-nodejs/python2.7-nodejs10/images/sha256-4f82aca70243cb3ec93d2f81ed89d22c5dd5a859e2186c28af3995638bb6517f?context=explore