fix Notebook issues

[zzti-bsj]

Description

1. Why the change?

To fix the Notebook issues

2. User API changes

No

3. Summary of the change

1. Removed the NOTEBOOK_TOKEN and NOTEBOOK_PORT value in docs and Dockerfiles
2. Add the condition to start-notebook scripts to check if the NOTEBOOK_TOKEN or NOTEBOOK_PORT is empty

4. How to test?

• [X] N/A
• [ ] Unit test
• [ ] Application test
• [ ] Document test
• [ ] ...

5. New dependencies

• [ ] New Python dependencies - Dependency1 - Dependency2 - ...
• [ ] New Java/Scala dependencies and their license - Dependency1 and license1 - Dependency2 and license2 - ...