Update environment configuration, Docker setup, and frontend/backend dependencies

- Updated .env.example and .env files for backend and frontend with placeholder values.
- Enhanced .gitignore to include additional files and directories.
- Modified docker-compose.yml to change image names and improve service health checks.
- Updated README.md and SETUP_THE_PROJECT.md for clearer setup instructions.
- Added database initialization scripts and SQL files for structured database setup.
- Updated frontend Dockerfile to use Node.js 22 and adjusted package.json scripts.
- Improved error handling and logging in start scripts for better debugging.
- Added reCAPTCHA support in the signup page with conditional loading based on environment variables.

CONTRIBUTING.md

@@ -19,7 +19,7 @@ We have adopted a Code of Conduct to ensure a welcoming and inclusive environmen
 
 ## Coding Standards
 
-- Follow the [Angular Style Guide](https://angular.io/guide/styleguide) for the frontend code.
+- Follow the [React Documentation](https://react.dev/learn) for best practices in React development.
 - Use [TypeScript](https://www.typescriptlang.org/) for both frontend and backend code.
 - Follow the [Conventional Commits](https://www.conventionalcommits.org/) specification for commit messages.