Update app.py

app.py

@@ -9,7 +9,7 @@ hf_api_key = os.getenv('HF_API_KEY')
 ENDPOINT_URL = os.getenv('HF_API_SUMMARY_BASE')
 
 #Summarization endpoint
-def get_completion(inputs, parameters=None,ENDPOINT_URL=os.environ['HF_API_SUMMARY_BASE']): 
+def get_completion(inputs, parameters=None, ENDPOINT_URL=ENDPOINT_URL): 
     headers = {
       "Authorization": f"Bearer {hf_api_key}",
       "Content-Type": "application/json"