Update app.py

app.py

@@ -157,11 +157,11 @@ def used_gpu():
 
 def get_data():
     output = []
-    with open('Chain_data.json') as json_file:
+    with open('./Chain_data.json') as json_file:
         json_data = json.load(json_file)
     output.append({"gpus":get_gpus(), "total":{"total" : blockchain.get_total_gpu_mem(), "used":get_used_gpus(model_name)}, "chain":json_data+blockchain.chain})
 
-    with open('Chain_data.json', 'w') as outfile:
+    with open('./Chain_data.json', 'w') as outfile:
         json.dump(output['chain'], outfile)
     return output