[Container-tools] CDK Server Adapter - First Demo

[Hardy Ferentschik]

Hi,

> Well, I tried to at least.  As I said, I ran the command to re-install it,
> and it says it installed 0.0.19,  but the cdk folder still only has the
> 0.0.8 gem... so... that seems pretty weird.

The cdk folder just contains a specific version of the plugin to be installed
via 'vagrant plugin install vagrant-registration-0.0.8.gem'

Note, in the above command I specified the full name of the gem file. Only this way
it will install the plugin provided by file. The readme mentions
'vagrant plugin install vagrant-registration' which is wrong if you want to install
the plugin from file. In the latter case the latest version from rubygems.org will
be installed (https://rubygems.org/gems/vagrant-registration/versions/0.0.19).

TBH, I am not sure why the gem is included here at all. The vagrant way is
via rubygems.org and if a specific versions needs to be enforced, it could be
done via 'vagrant plugin install vagrant-registration --plugin-version 0.0.19'
This would be less confusing imo.

Last but not least, vagrant places installed plugins under ~/.vagrant.d/gems/gems.

--Hardy