Improve setting up section of the developer guide

[tlylt]

Please confirm that you have searched existing issues in the repo

Yes, I have searched the existing issues

Any related issues?

#1795

What is the area that this feature belongs to?

Documentation

Is your feature request related to a problem? Please describe.

Filing this issue to be a constant reminder for us to keep the setup section up-to-date and useful for new developers.

In particular, I am looking for new developers to add more/edit content in the "Common setup questions".

• If you happen to face any difficulty when setting up, or if there are any confusing parts of the setting up process that you would like to highlight.

Side note: For any PRs targeting this issue, please avoid using the issue closing keyword such as "fixes xxx" to prevent closing this issue. (you can use this PR relates to issue xxx instead)

Describe the solution you'd like

Improve developer guide with more and relevant FAQs

Describe alternatives you've considered

No response

Additional context

No response