Update app.py

app.py

@@ -53,6 +53,10 @@ async def generate_image_async(prompt, aspect_ratio):
         app_commands.Choice(name="1:1 (Square)", value="1:1"),
         app_commands.Choice(name="9:16 (Vertical)", value="9:16"),
         app_commands.Choice(name="16:9 (Horizontal)", value="16:9"),
+        app_commands.Choice(name="3:4", value="3:4"),
+        app_commands.Choice(name="4:3", value="4:3"),
+        app_commands.Choice(name="9:21", value="9:21"),
+        app_commands.Choice(name="21:9", value="21:9"),
     ]
 )
 async def generate_command(