fix: server routes handle per verb middlewares

fixes #4490

Author: schiller-manuel

packages/start-server-core/src/createStartHandler.ts

@@ -375,9 +375,26 @@ async function handleServerRoutes(opts: {
 
       if (method) {
         const handler = serverTreeResult.foundRoute.options.methods[method]
-
         if (handler) {
-          middlewares.push(handlerToMiddleware(handler) as TODO)
+          if (typeof handler === 'function') {
+            middlewares.push(handlerToMiddleware(handler) as TODO)
+          } else {
+            if (
+              (handler as any)._options.middlewares &&
+              (handler as any)._options.middlewares.length
+            ) {
+              middlewares.push(
+                ...flattenMiddlewares(
+                  (handler as any)._options.middlewares,
+                ).map((d) => d.options.server),
+              )
+            }
+            if ((handler as any)._options.handler) {
+              middlewares.push(
+                handlerToMiddleware((handler as any)._options.handler),
+              )
+            }
+          }
         }
       }
     }