Implement Sample App for Super Command functionality

[idrabenia]

Need to develop sample application (that will be seems like script). It will instantiate 3 linux servers: First for NGINX with proxy, second for Apache HTTP Server with application and next for MySQL database. First server must contains public IP address, third must have some additional disks. Configuration of this infrastructure must be implemented as single service layer call.

Proposed group structure:

group("Application").subitems(
    nginxServer(),
    group("Logic").subitems(
        apacheHttpServer(),
        mysqlServer()
    )
)