Merge branch '4.4' into 5.2

* 4.4:
  [Symfony CLI] Document about `APP_ENV=test` behavior

Author: javiereguiluz

setup/symfony_server.rst

@@ -322,6 +322,22 @@ prefixed with ``DB_``, but as the ``com.symfony.server.service-prefix`` is set
 to ``DATABASE``, the web server creates environment variables starting with
 ``DATABASE_`` instead as expected by the default Symfony configuration.
 
+You don't need to create two containers for the main database and the test
+database. Using ``APP_ENV=test symfony`` will automatically adjust
+``DATABASE_*`` environment variables for the ``test`` environment:
+
+.. code-block:: terminal
+
+    $ symfony var:export --multiline 
+    export DATABASE_DATABASE=app
+    export DATABASE_NAME=app
+    export DATABASE_URL=postgres://app:app@127.0.0.1:49160/app?sslmode=disable&charset=utf8
+
+    $ APP_ENV=test symfony var:export --multiline 
+    export DATABASE_DATABASE=app_test
+    export DATABASE_NAME=app_test
+    export DATABASE_URL=postgres://app:app@127.0.0.1:49160/app_test?sslmode=disable&charset=utf8
+
 Here is the list of supported services with their ports and default Symfony
 prefixes: