Docker update method

[simoncn]

MinimServer autoupdate (on any platform, not just Docker) checks the license first and doesn't autoupdate to the current version if this version is not compatible with the currently active full license. The same check is made if the user tries to install an update manually.

The situation where this can cause problems is when the license has been downgraded to starter for any reason. In this case, MinimServer will autoupdate to the current version and this can prevent the user from activating their full license because it is not compatible with the update version that is running.