Bug: "Signup Failed" error when trying to create an account.

[mohanteja781112]

Description: I tried to run the project locally, but when I attempted to Sign Up, I got a "Signup Failed" error.

The Reason: I investigated the "Signup Failed" error and identified three root causes preventing local setup:

Configuration: The project was missing necessary .env setup instructions (Auth Secrets).

CORS Policy: The backend was not configured to accept requests with credentials from the frontend port.

Frontend Connection: The client was hardcoded to localhost:3000, while the backend runs on 5000.

Proposed Solution: I have already figured out the correct setup. I would like to include the MongoDB setup steps and fix remaining errors so new contributors don't face this error.
@codervivek5 , can you assign this issue to me?

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