Add docker image

[lilianabs]

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Please check the options that you have completed and strike-out the options that do not apply via this pull request:

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Goal or purpose of the PR

This PR adds a docker image for the package development.

[neomatrix369]

@lilianabs looks neat, nice work! I will test it out and share my comments here.

[neomatrix369]

Could you pls post a screen shot of the docker container running and giving you a prompt as per the code - does not have to be exact or working, just want to see what it looks like on your end.

It's easy to take a screenshot and drag it into the comment box and it turns it into a image url to link to

[lilianabs]

Could you pls post a screen shot of the docker container running and giving you a prompt as per the code - does not have to be exact or working, just want to see what it looks like on your end.

It's easy to take a screenshot and drag it into the comment box and it turns it into a image url to link to

Thank you for reviewing the PR Mani! Here is a screenshot: