Update app.py

app.py

@@ -8,8 +8,12 @@ subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'groq'])
 
 from groq import Groq
 
-# 初始化 Groq 客戶端
+# 從環境變數中獲取 Groq API 密鑰
 groq_key = os.getenv("groq_key")
+if not groq_key:
+    raise ValueError("Please set the groq_key environment variable.")
+
+# 初始化 Groq 客戶端
 client = Groq(api_key=groq_key)
 
 def chatbot_response(user_message):