Fix ssg race condition (#3521)

* Fix server crash logging and opening fullstack apps

* Fix race condition during SSG

* move route prerendering into a separate stage

* Fix static site generation with dx serve

* only proxy the fullstack server if ssg is disabled

* test nested-suspense with ssg in playwright

packages/playwright-tests/nested-suspense/src/ssg.rs

@@ -0,0 +1,27 @@
+#![allow(non_snake_case)]
+use dioxus::prelude::*;
+use nested_suspense::app;
+
+fn main() {
+    dioxus::LaunchBuilder::new()
+        .with_cfg(server_only! {
+            ServeConfig::builder()
+                .incremental(
+                    IncrementalRendererConfig::new()
+                        .static_dir(
+                            std::env::current_exe()
+                                .unwrap()
+                                .parent()
+                                .unwrap()
+                                .join("public")
+                        )
+                )
+                .enable_out_of_order_streaming()
+        })
+        .launch(app);
+}
+
+#[server(endpoint = "static_routes")]
+async fn static_routes() -> Result<Vec<String>, ServerFnError> {
+    Ok(vec!["/".to_string()])
+}