added introductory prompt

backend.py

@@ -38,7 +38,7 @@ Settings.llm = GemmaLLMInterface()
 documents_paths = {
     'blockchain': 'data/blockchainprova.txt',
     'metaverse': 'data/metaverseprova.txt',
-    'payment': 'data/payment'
+    'payment': 'data/paymentprova.txt'
 }
 
 session_state = {"index": False,
@@ -72,7 +72,7 @@ def build_index(path: str):
 
 
 
-@spaces.GPU(duration=20)
+@spaces.GPU()
 def handle_query(query_str: str, 
                  chat_history: list[tuple[str, str]]) -> Iterator[str]:
         
@@ -137,11 +137,19 @@ def handle_query(query_str: str,
         
         #response = chat_engine.chat(query_str)
         for token in response.response_gen:
-          #if not token.startswith("system:") and not token.startswith("user:"):
+          if not token.startswith("system:") and not token.startswith("user:"):
+            
+            if token.startswith("file_path:"):
+              source = token
           
             outputs.append(token)
             print(f"Generated token: {token}")
             yield "".join(outputs)
+        
+        outputs.append(f"Fonti utilizzate: {source}")
+        yield "".join(outputs)     
+            
+        
           
         
     except Exception as e: