Update app.py

app.py

@@ -21,7 +21,7 @@ def tryon(person_img, garment_img, seed, randomize_seed):
     encoded_garment_img = cv2.imencode('.jpg', cv2.cvtColor(garment_img, cv2.COLOR_RGB2BGR))[1].tobytes()
     encoded_garment_img = base64.b64encode(encoded_garment_img).decode('utf-8')
 
-    url = "http://" + os.environ['tryon_url'] + "Submit"
+    url = "http://" + os.environ.get('tryon_url', 'localhost:8000') + "/Submit"
     token = os.environ['token']
     cookie = os.environ['Cookie']
     referer = os.environ['referer']