Add setup.md file

[1-ankush-1]

Is your feature request related to a problem? Please describe.
The setup.md file appears to be missing from the repository. This file is typically used to provide instructions on how to set up and run the project locally. Without it, contributors might have a hard time getting started with contributing to the project.

Describe the solution you'd like
You need to create a step by step instruction of how user can run this project locally.

Additional context
Assign this to me .

[Artlfmj]

Done

[Artlfmj]

🕒 Reminder: 24-Hour Assignment Commit Deadline 🕒

Hello @1-ankush-1 ,

Thank you for accepting the assignment for this issue. We appreciate your willingness to contribute to the Course Manager project!

This is a friendly reminder that you have a 24-hour window to make your initial commit to this issue. If you are unable to make the commit within this timeframe, your assignment will be automatically removed to allow other contributors to work on it.

Please feel free to reach out if you have any questions or need assistance with the issue. We're here to help!

Happy coding! 🚀

[Artlfmj]

Resolved by #41