diff --git a/.env.example b/.env.example
index 02224e6..64158c9 100644
--- a/.env.example
+++ b/.env.example
@@ -1,9 +1,10 @@
 # Telegram files log level, ALL < FINEST < FINER < FINE < CONFIG < INFO < WARNING < SEVERE < OFF
 LOG_LEVEL=INFO
+APP_ENV=prod
 # The root directory of the application
-APP_ENV=dev
-APP_ROOT=
-TDLIB_PATH=
+APP_ROOT=/app/data
+# only use in test
+#TDLIB_PATH=
 
 TELEGRAM_API_ID=
 TELEGRAM_API_HASH=