Feature request: make docker packages easier to install, setup and use like the current plugins

[Samuel12321]

Currently docker packages are not very user frendly, especially if you have little or no experience using docker packages or are a less technically minded person(general consumer). With many plugins going to cease development and become docker apps in the future due to their many advantages, an easier to use more user friendly system is needed.

#330
openmediavault/openmediavault#330

[enriquevagu]

+1.

The whole concept of OpenMediaVault and OMV-Extras relies on automated and simple installation and configuration of services. If the user needs to configure the whole process, he can simply do it from the command line, no value is provided.

There are multiple packages that have been moved to docker functions, but in practice this is almost equal to remove the functionality for most users. For some of these "abandoned" plugins (openvpn, transmission, ... name the most frequent), it would be great to have an automated script that downloads the appropriate image and configures all the required folders, permissions, ports, volumes, environment variables, etc.