add a log message

server/src/main.rs

@@ -93,6 +93,7 @@ fn gif(state: Arc<Mutex<State>>) -> impl Filter<Extract = impl Reply, Error = Re
 async fn main() {
     let state = Arc::new(Mutex::new(State::default()));
 
+    println!("Listening on 0.0.0.0:80");
     warp::serve(
         beat(state.clone())
             .or(gif(state))