Update 'Home'

Home.md

@@ -37,7 +37,12 @@ services:
 ### I'm trying to run CLI tt-rss scripts inside the container and they complain about root
 
 ```sh
-docker exec -it --user app APP_CONTAINER_ID /var/www/html/tt-rss/update.php --help
+docker-compose exec --user app app php8 /var/www/html/tt-rss/update.php --help
+
+#                           ^   ^ 
+#                           |   | 
+#                           |   +- service (container) name
+#                           +----- run as user
 ```
 
 ### How do I add plugins and themes?