[Feature] Change the step to use CodeSpace

[wongcyrus]

Is your feature request related to a problem? Please describe.
It will be better to complete every step without depending on the local computer software and it can simplify the setup.

Describe the solution you'd like
The instruction can follow my demo to use CodeSpace to complete the exercise.
https://www.youtube.com/watch?v=vfxhVIBjMb0

[hectorsector]

Thanks so much for the suggestion and for the video, @wongcyrus! I'll triage this for review.

[mjbear]

Adding the option to use Codespaces is an excellent idea worth adding to the course.
It would still be handy to include the local Docker instructions in some form.

My $0.02

Edit:

• If anyone is interested, the part about dev container is at 9:10 of the video.
• dev container intro docs
• It isn't necessary to run docker login with a Personal Access Token from within Codespaces