Test API and ensure it works with the base frame

[techquantacommunity]

• Start server locally
• Test the endpoint using a sample GitHub username
• Ensure the API returns a PNG image
• Add instructions in README for local testing

[shivram9]

Hi, I’d like to work on this. I’ll start the server locally, test the endpoint with a sample GitHub username, ensure it returns a PNG, and update the README with local testing instructions. Please assign me this issue. 🚀

[shivram9]

Can you please check the changes