tracing running only when enabled

README.md

@@ -14,3 +14,7 @@ Client:
 cargo watch -x 'run --package client -- client'
 ```
 
+Client with tracing:
+```
+ENABLE_TRACING=1 RUST_LOG=client=debug cargo watch -x 'run --package client -- client'
+```

client/src/main.rs

@@ -3,10 +3,13 @@ use client::run_ui;
 use dotenvy::dotenv;
 use anyhow::Result;
 use tracing_subscriber;
+use std::env;
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    tracing_subscriber::fmt::init();
+    if env::var("ENABLE_TRACING").is_ok() {
+        tracing_subscriber::fmt::init();
+    }
 
     dotenv().ok();
     run_ui().await