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/dx-wire-format/src/lib.rs

@@ -57,6 +57,7 @@ pub enum BuildStage {
     },
     RunningBindgen,
     OptimizingWasm,
+    PrerenderingRoutes,
     CopyingAssets {
         current: usize,
         total: usize,