Заголовок
Keeping your environments separate isn’t just good practice to keep things tidy; it's absolutely necessary! Each one has a distinct role: local development
is where new features are built and tested locally; staging
acts as a production-like environment for final checks and production
is the live system your users interact with. By clearly defining the purpose of each, you ensure unstable or experimental code doesn't unintentionally affect your users and create safer conditions for testing, debugging, and releasing.
Furthermore, services like databases should never be exposed to the public Internet unless absolutely necessary. Locking down these layers reduces the surface area for potential attacks.