I would like to create subdomain blog.learningflow.net for main domain learningflow.net, where will be link to this blog. Blog site will have WordPress installed. How can I create and configure subdomain from ispconfig3 panel? Should I add 'A record' to DNS like this -> 'blog A server_ip_address' ? Should be new database etc for blog subdomain? Main directory for learningflow.net on server is (automatically created link) /var/www/learningflow.net/web and /var/www/clients/client2/learningflow.net/web.