Updated comments

Author: javiereguiluz

.env.local

@@ -1,4 +1,9 @@
-# in your own Symfony applications, you can leave this secret empty,
-# but in this demo application, we need it so the application runs out of the box.
-# see https://symfony.com/blog/new-in-symfony-7-2-optional-secret
+# In regular Symfony applications, this file should not be committed
+# to a shared repository. We're including it in this demo app because
+# we need to assign a value to a specific environment variable.
+# See: https://symfony.com/doc/current/configuration.html#overriding-environment-values-via-env-local
+
+# In your own Symfony projects, you can leave the secret empty.
+# However, in this demo app we provide one so it works out of the box.
+# See: https://symfony.com/blog/new-in-symfony-7-2-optional-secret
 APP_SECRET=2ca64f8d83b9e89f5f19d672841d6bb8