//! Environment variable configuration example for prologger.
//!
//! Demonstrates using `RUST_LOG` to control log levels at runtime.
//!
//! Try these:
//! RUST_LOG=trace cargo run --example env_config
//! RUST_LOG=warn cargo run --example env_config
//! RUST_LOG=error,env_config=debug cargo run --example env_config
//! cargo run --example env_config (defaults to Info)
use ;