ENV variables files load ordering

Standard Loading Order (Highest to Lowest)

1. .env.local (local overrides, all environments)
2. .env.[mode].local (local overrides, specific mode)
3. .env.[mode] (e.g., .env.development)
4. .env (default settings) 

Example: If DB_HOST is defined in both files, the value in .env.local will be used.