Update app.py

app.py

@@ -1,13 +1,16 @@
 import os
-
+import gradio
 APP_CHOICES = {
     "Default App": "simple_app",
-    "Advanced App": "adv_app"
+    "Advanced App": "adv_app",
+    "fine-tune": "tuner"
 }
 
 app_choice = os.getenv("APP_CHOICE", "simple_app")
 
 if app_choice == "adv_app" and os.path.exists("adv_app.py"):
     from adv_app import *
+elif app == "simple_app" and os.path.exists("simple_app.py"):
+    from simple_app import *
 else:
-    from simple_app import *
+    from tuner import *