cambie parametros por defecto de mysql

app/config/parameters.yml.dist

@@ -2,11 +2,11 @@
 # Set parameters here that may be different on each deployment target of the app, e.g. development, staging, production.
 # http://symfony.com/doc/current/best_practices/configuration.html#infrastructure-related-configuration
 parameters:
-    database_host:     127.0.0.1
+    database_host:     mysql
     database_port:     ~
     database_name:     fd3_radius
     database_user:     root
-    database_password: ~
+    database_password: %env(MYSQL_ROOT_PASSWORD)%
     # You should uncomment this if you want use pdo_sqlite
     # database_path: "%kernel.root_dir%/data.db3"