docs(README): update environment configuration description

- Replace outdated information about environment configuration
- Explain production-ready environment tooling using --dart-define
- Highlight error-proof configuration and advantages
- Improve readability and clarity of the description

Author: fulleni

README.md

@@ -107,9 +107,10 @@ Developed with best practices for a maintainable and scalable codebase:
 
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-### 🛠️ Flexible Environment Configuration
-Switch between development (in-memory data or local API) and production environments with a simple code change.
-> **🚀 Your Advantage:** This setup speeds up the development cycle and simplifies deployment.
+### 🛠️ Production-Ready Environment Tooling
+Utilizes compile-time variables (`--dart-define`) to seamlessly switch between `production`, `development`, and `demo` environments.
+- **Error-Proof Configuration:** This approach ensures environment-specific settings like API endpoints are set at build time, preventing accidental release of development configurations.
+> **Your Advantage:** A robust, professional environment setup that streamlines the development-to-production pipeline and prevents common configuration mistakes.
 
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