Update app.py

app.py

@@ -1,8 +1,8 @@
 import flet as ft 
 import flet_fastapi
-async def main (page:ft.Page):
+def main (page:ft.Page):
 
-    await page.add_async(ft.ElevatedButton("hi"))
+    page.add(ft.ElevatedButton("hi"))
 
-app =flet_fastapi.app(main)
+ft.app(main)