Add Dockerfile and instructions for vscode and google cloud

[gcattan]

This PR enables building a docker image after each pull request or push.
This allows seamless integration with cloud providers such as IBM Cloud Engine or Google Cloud Run.
I am pushing the vs code environment script too, for local use with Remote - Container vs code extension, and I completed the readme with steps on how to configure google cloud environment to run a pyriemann-qiskit container.

[gcattan]

Working as expected in google cloud:

[toncho11]

So what are the advantages of running on Google Cloud?

1. Quantum emulation will be faster compared to a local computer?

2. Is Google cloud free?

3. We can leave our application running there for days until the results from a real quantum computer are completed?

4. Can the space on google cloud accommodate the automatic download of the training data?

[gcattan]

Hi :)

1. It will be faster it you set up a better configuration than your local machine.
2. They have a trial period of about 3 months. After this, only some services are free, within specified usage limit.
3. Yes, but your cloud run service might be restarted if there is no request. Here I provided an example with Cloud Run. If you intend to run it for days, we will probably interested in the Compute Engine solution.
4. Yes. The price depends on the types and quantity of the storage.

[gcattan]

Thx for the review @toncho11 :)