changed checkpoint path

app.py

@@ -39,7 +39,7 @@ def load_class_names():
 def load_model():
     try:
         model = ResNet50(num_classes=1000)
-        checkpoint = torch.load("checkpoints\model_best.pth", map_location=torch.device("cpu"))
+        checkpoint = torch.load("./checkpoints/model_best.pth", map_location=torch.device("cpu"))
         # Extract just the model state dict from the checkpoint
         if "model_state_dict" in checkpoint:
             model.load_state_dict(checkpoint["model_state_dict"])