Fix some CI (windows + nasm, core-macro error) (#2676)

* Moves index.html creation until after wasm creation so the webserver doesn't prematurely serve the page
* sets up nasm for windows builds (to be superseded by Remove Dioxus CLI NASM dependency #2666 #2682)
* puts magnanis-cli-support in a blocking task to prevent threadlocking during sequential builds
* changes order of client/server builds such that the client is built before the server so the webserver doesn't prematurely serve invalid client code
* declobbers "serve" such that each project gets a different dir in the target folder
* uses nest_service instead of fallback so the router doesn't respond with fallback codes
* reincorporates doge's fix from Fix hot-reloading on Windows #2544

packages/cli/src/builder/web.rs

@@ -120,11 +120,6 @@ impl BuildRequest {
             update: UpdateStage::Start,
         });
 
-        // Create the index.html file
-        let html = self.prepare_html(assets)?;
-        let html_path = self.dioxus_crate.out_dir().join("index.html");
-        std::fs::write(&html_path, html)?;
-
         // Find the wasm file
         let output_location = build_result.executable.clone();
         let input_path = output_location.with_extension("wasm");
@@ -177,6 +172,14 @@ impl BuildRequest {
             .await
             .unwrap()?;
 
+        // Create the index.html file
+        // Note that we do this last since the webserver will attempt to serve the index.html file
+        // If we do this too early, the wasm won't be ready but the index.html will be served, leading
+        // to test failures and broken pages.
+        let html = self.prepare_html(assets)?;
+        let html_path = self.dioxus_crate.out_dir().join("index.html");
+        std::fs::write(html_path, html)?;
+
         Ok(())
     }
 }