Configure secure backend environment via .env file

[Adnanmd76]

This PR introduces the .env file for backend services, including Supabase service role key, JWT secret, encryption key, and secure RPC endpoints for Alchemy, Infura, and Stacks. These variables are critical for protected data access, token verification, and secure blockchain interactions.

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Summary of Changes

Hello @Adnanmd76, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request establishes a secure backend environment by introducing a .env file to centralize sensitive configuration variables. This change is crucial for safeguarding protected data access, ensuring robust token verification, and facilitating secure interactions with various blockchain services like Supabase, Alchemy, Infura, and Stacks. The new setup enhances the overall security posture and operational integrity of the backend services.

Highlights

• Secure Environment Configuration: Introduced a .env file to centralize and manage sensitive backend environment variables, enhancing security and maintainability.
• Supabase Integration: Added SUPABASE_URL and SUPABASE_SERVICE_ROLE_KEY to enable secure access and interaction with Supabase services.
• Cryptographic Keys: Included REACT_APP_JWT_SECRET and REACT_APP_ENCRYPTION_KEY for robust token verification and data encryption.
• Blockchain RPC Endpoints: Configured secure RPC endpoints for Alchemy, Infura, and Stacks, facilitating protected and reliable blockchain interactions.
• Environment Flags: Set NODE_ENV to production and DEBUG to false to ensure appropriate environment settings for deployment.

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Code Review

This pull request introduces a .env file containing hardcoded secrets, which constitutes a critical security vulnerability. The secrets, including API keys and service role keys, are exposed within the repository. My review identifies this critical issue, explains the associated risks, and provides a clear remediation path. The recommended solution is to remove the secrets from version control, rotate the compromised credentials, and use a .env.example file for configuration templating, which aligns with security best practices and your project's existing documentation.