Add support for "1-Click Install" services/apps

[bohdan-shulha]

Many services developers and agencies use are being configured mostly the same (with some deviations).

PostgreSQL, MongoDB, Wordpress, etc. They can be easily "templatized", so that users don't need to spend time to pick and configure docker containers from scratch.

When creating a service, we need to present a user a new option "start with template" or "preconfigured service".

The concept has to be thoroughly thought before making any implementation.

[bohdan-shulha]

Decided to not create extra concepts and, for now, going to just "templatize" the services from the service creation screen.