> How can I configure Nginx + php-fpm 7.0 + mysql 5.7 ??
You need to install Ubuntu 16 and then install the panel --> Log in to ISPmanager -->Features --> Disable Apache (Nginx and FPM will keep on running).
>I tried to do this on CentOS 6, but with no success.
CentOS 6 supports MySQL 5.3 by default. If you want to use this OS, you can change the MySQL version as described in this
article
> Does Ubuntu 14 support PHP-fpm 7.0 and MySQL 5.7?
It doesn't support it by default, you will need to update the software manually on the server.