Build a system with Kubernetes and Docker for a website.

I need to build a system to offer a SAAS by website. When the customer is registered a new container should be create for this customer and a NextCloud has to be installed on the container. The customer has to have his own url to login into his own NextCloud. Like [login to view URL] to let the customers use Nextcloud. The data to login (URL, user and password) must be sent by email to the customer. The website will be in a server and the container will be create in other server. Containers software Google Kubernetes Engine to manager Docker containers. The server is installed with a especific Centos7 to work with containers. (DOCKER-Atomic-CentOS-7-x86_64)