change config flags from ssr to server to match the features

packages/fullstack/examples/warp-hello-world/src/main.rs

@@ -47,7 +47,7 @@ async fn get_server_data() -> Result<String, ServerFnError> {
 fn main() {
     #[cfg(feature = "web")]
     tracing_wasm::set_as_global_default();
-    #[cfg(feature = "ssr")]
+    #[cfg(feature = "server")]
     tracing_subscriber::fmt::init();
 
     launch(app);