everactive-cli Docker image

[rachhouse]

I propose that we create a Docker image for the everactive-cli that enables users to run the CLI without needing to install it in their local environment. By using a Dockerized version of the everactive-cli, users can simply pull and build the image, then alias their local everactive-cli (or similar command) to run the commands via the Docker container. CLI upgrade? Just pull the new image, and you're set!

As an example - AWS offers their AWS CLI as a Docker image:

• https://docs.aws.amazon.com/cli/latest/userguide/getting-started-docker.html
• https://hub.docker.com/r/amazon/aws-cli

Though I am admittedly a containerization zealot when it comes to local development, I think offering a Dockerized everactive-cli option will benefit both us and our users. Running code via a controlled container environment minimizes the potential for edge case and individualized problems due to local environment settings - reducing headaches & frustrations for our users and support time for us.