feat: add control over the log levels using the RUST_LOG env variable

README.md

@@ -30,12 +30,26 @@ The `turn-me-off` binary should located in `target/release/`.
 
 ## Usage
 
+### Starting the server
+
 Executing the binary starts the HTTP server, and you should be able to access a
 Swagger UI documenting the API at the address http://localhost:3000/docs/#/
 
+### Changing the port
+
 Note that the port 3000 is the default port, to control the port on which it listens,
 you can use the environment variable `TMF_PORT`:
 
 ```Shell
 TMF_PORT=3001 turn-me-off
 ```
+
+### Controlling log levels
+
+By default the server will only log the minimum information (startup, shutdown, ...),
+you can enable more logs, for example all connections established with the server, by
+setting the env variable [`RUST_LOG`](https://docs.rs/env_logger/0.11.1/env_logger/#enabling-logging):
+
+```Shell
+RUST_LOG=trace turn-me-off
+```

src/main.rs

@@ -23,6 +23,10 @@ async fn main() {
     struct ApiDoc;
 
     tracing_subscriber::registry()
+        .with(
+            tracing_subscriber::EnvFilter::try_from_default_env()
+                .unwrap_or_else(|_| "turn_me_off=info".into()),
+        )
         .with(tracing_subscriber::fmt::layer())
         .init();
 
@@ -38,7 +42,7 @@ async fn main() {
         .await
         .unwrap_or_else(|_| panic!("Could not listen on port {port}"));
 
-    tracing::debug!(
+    tracing::info!(
         "Linstening on {}",
         listener
             .local_addr()
@@ -89,7 +93,7 @@ async fn shutdown() {
     };
 
     tokio::select! {
-        () = ctrl_c => { tracing::debug!("Ctrl+c received. Bye!")},
-        _ = terminate => { tracing::debug!("SIGTERM received. Bye!")},
+        () = ctrl_c => { tracing::info!("Ctrl+c received. Bye!")},
+        _ = terminate => { tracing::info!("SIGTERM received. Bye!")},
     }
 }