updated app.py

app.py

@@ -8,12 +8,20 @@ from googleapiclient.discovery import build
 import base64
 from datetime import datetime, timedelta
 
+# Gmail API scope
 # Gmail API scope
 SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']
 
-# Load OAuth credentials
-with open('client_secret.json') as f:
-    CLIENT_CONFIG = json.load(f)
+# Instead of reading from file, get credentials from environment variables
+CLIENT_CONFIG = {
+    "installed": {
+        "client_id": os.environ.get('GOOGLE_CLIENT_ID'),
+        "client_secret": os.environ.get('GOOGLE_CLIENT_SECRET'),
+        "redirect_uris": ["urn:ietf:wg:oauth:2.0:oob"],
+        "auth_uri": "https://accounts.google.com/o/oauth2/auth",
+        "token_uri": "https://oauth2.googleapis.com/token",
+    }
+}
 
 # Keywords for filtering emails
 KEYWORDS = {