add EH-expansion-evaluator tool as a docker image

[hopedisastro]

No description provided.

[hopedisastro]

Let me know if there's a better way to do this, this is my first time making a Docker image out of something that's not a binary on Git.

[MattWellie]

The cd you've included here will only change the CWD during the build process - to make this permanent (i.e. each time you run the Docker image) you need to use the WORKDIR keyword

[jmarshall]

This is pretty old by now.

Suggested change

	FROM ubuntu:20.04
	FROM ubuntu:22.04

[hopedisastro]

linting errors are going a bit crazy, checking other files in the repo. But I think I've fixed the necessary linting changes.