Implement Local Deployment Readiness & ENV Configs

[Siddharthakhandelwal]

Hardcoded variables and URLs prevent testers/users from easily bringing up the project locally. Environment variables need to be extracted and managed properly.
Tasks/Acceptance Criteria:

• Remove hardcoded API_BASE or localhost URLs across frontend views and services.
• Replace them using Vite build environment variables (import.meta.env.VITE_API_BASE).
• Ensure backend similarly imports ESMFold keys or internal endpoints safely using os.getenv.
• Create a docker-compose.yml to effortlessly bring up both React and FastAPI concurrently OR specify clear npm/python scripts in a README.md.
• Push a generic .env.example mapping out required configs so new devs can run the app seamlessly.