Fix mailer

.env.example

@@ -108,8 +108,8 @@ COOKIE_SECURE=false
 # If you want Firefly III to mail you, update these settings
 # For instructions, see: https://docs.firefly-iii.org/advanced-installation/email
 # If you use Docker or similar, you can set these variables from a file by appending them with _FILE
-MAIL_DRIVER=log
-MAIL_HOST=smtp.mailtrap.io
+MAIL_MAILER=log
+MAIL_HOST=null
 MAIL_PORT=2525
 MAIL_FROM=changeme@example.com
 MAIL_USERNAME=null