Update app.py

app.py

@@ -85,7 +85,7 @@ dict = {
 def text_to_speech(text, language_code):
     # Replace with your own subscription key and region identifier from Azure portal
     subscription_key = os.getenv('subscription_key')
-    region = "eastus"
+    region = os.getenv('region')
 
     # Creates an instance of a speech config with specified subscription key and service region.
     speech_config = speechsdk.SpeechConfig(subscription=subscription_key, region=region, speech_recognition_language=dict[language_code])