Add dockerfile

[chenditc]

Add a dockerfile to package latest qlib code, jupyter notebook and qlib dataset. So that user can use one line to start playing with qlib:

docker run --rm -it -p 8888:8888 microsoft/qlib

Description

Motivation and Context

Some time I want to experiment some computational expensive model, I would like to use Azure spot instance. If there is a docker image, the process can be much easier. User can user VM's user data to run this one line and start using it.

How Has This Been Tested?

• [ ] Pass the test by running: pytest qlib/tests/test_all_pipeline.py under upper directory of qlib.
• [ ] If you are adding a new feature, test on your own test scripts.

I build the image and run locally, which works fine.

Screenshots of Test Results (if appropriate):

1. Pipeline test:
2. Your own tests:

Types of changes

• [ ] Fix bugs
• [x] Add new feature
• [ ] Update documentation