Update app.py

app.py

@@ -68,7 +68,7 @@ __version__ = "0.0.3"
 class GeminiConfig:
     """Configuration settings for Gemini API."""
     def __init__(self):
-        self.api_key = os.getenv(KEY_NAME)
+        self.api_key = os.environ.get(KEY_NAME)
         self.host = "generativelanguage.googleapis.com"
         self.model = "models/gemini-2.0-flash-exp"
         self.ws_url = f"wss://{self.host}/ws/google.ai.generativelanguage.v1alpha.GenerativeService.BidiGenerateContent?key={self.api_key}"