Remove anything Docker related from the README

[alex-l-kong]

What is the purpose of this PR?

Closes #1145. Due to issues users have had trying the Docker setup, it's best for the general public not to use this setup.

How did you implement your changes

Remove anything from the README.md about Docker setup. Instead, provide detailed instructions for using conda environments and ./start_jupyter.sh.

[alex-l-kong]

@cliu72 the failing tests are due to the ongoing pytorch issue (#1150)

[camisowers]

Since the conda env will be the way we support ark from now on, could use a little more info on how to maintain it like we have written up in toffy. For example, an updating the repo section is probably necessary.

[srivarra]

@alex-l-kong I think we can also remove all docker functionality in this PR such as the Dockerfile, and the docker.yml workflow. What do you think, or we can toss that into another issue?

[alex-l-kong]

@alex-l-kong I think we can also remove all docker functionality in this PR such as the Dockerfile, and the docker.yml workflow. What do you think, or we can toss that into another issue?

@srivarra I can remove the Docker badge from this PR. The complete removal of Docker I wanted to save for a different PR. Mostly because I think it'll still be good to have around as legacy. Main goal is to keep this hidden from the instruction manual as much as possible so it doesn't confuse users.

[srivarra]

@alex-l-kong Sounds good to me!

[camisowers]

Nice