chg: pkg: make compatible the whole project with bare metal AND with docker #4

.env.dist

@@ -16,7 +16,8 @@ APP_SECRET=c1c278747d952ea66326352b72bb8ec6
 DATABASE_URL=mysql://db_user:db_password@127.0.0.1:3306/db_name
 ###< doctrine/doctrine-bundle ###
 ###> symfony/mailer ###
-# MAILER_DSN=smtp://localhost
+MAILER_DSN=smtp://localhost:1025
+MAIL_DOMAIN=localhost
 ###< symfony/mailer ###
 
 ###> symfony/mercure-bundle ###