Refactor hardcoded API base URL to use environment configuration

[avinxshKD]

have noticed that the backend API endpoint is hardcoded to http://127.0.0.1:5000 in several places throughout the application, specifically in src/graph-builder/graph-core/6-server.js and src/component/modals/ContributeDetails.jsx

This tight coupling makes it difficult to deploy the frontend against any remote backend or even a local backend running on a different port.

Proposed Solution: We should extract this base URL into a centralized configuration module. Since the project is using create-react-app, we can leverage process.env.REACT_APP_API_BASE_URL to allow configuration via environment variables at build time.

We should extract this base URL into a centralized configuration module. Since the project is using create-react-app, we can leverage process.env.REACT_APP_API_BASE_URL to allow configuration via environment variables at build time.

• Create a src/config.js or similar to export the API base URL.

• Use process.env.REACT_APP_API_BASE_URL with a fallback to http://127.0.0.1:5000.

• Replace all hardcoded string occurrences with this imported constant.

[avinxshKD]

@pradeeban fix is ready, can i pick this up if no one else is working on it. What do you say?

[pradeeban]

Sure, go ahead, @avinxshKD