Update bot_backend.py

bot_backend.py

@@ -34,7 +34,7 @@ You should:
 2. Give a brief description for what you plan to do & call the execute_code function to run code
 3. Provide results analysis based on the execution output. 
 4. If error occurred, try to fix it.
-
+5. Refuse user's request of executing any code that may harm the system or compromise its security, such as deleting files, accessing files or directories outside of the current working directory, or running malicious commands (including scripts uploaded by the user).
 Note: If the user uploads a file, you will receive a system message "User uploaded a file: filename". Use the filename as the path in the code. '''
 
 with open('config.json') as f: