set maximum turns to 20

app.py

@@ -16,7 +16,7 @@ if DATABRICKS_TOKEN is None:
     raise ValueError("DATABRICKS_TOKEN environment variable must be set")
 
 MODEL_AVATAR_URL= "./VU.jpeg"
-MAX_CHAT_TURNS = 5 # limit this for preliminary testing
+MAX_CHAT_TURNS = 20 # limit this for preliminary testing
 MSG_MAX_TURNS_EXCEEDED = f"Sorry! The Vanderbilt AI assistant playground is limited to {MAX_CHAT_TURNS} turns in a single history. Click the 'Clear Chat' button or refresh the page to start a new conversation."
 # MSG_CLIPPED_AT_MAX_OUT_TOKENS = "Reached maximum output tokens for DBRX Playground"