Specifies how the container is configured
The notion of Configuration is different from the notion of Installation. Indeed a container is installed in the place where you have installed it (or where the Cargo Installer has installed it).
However, it is possible to configure this container to tell it deploy archives to some other directories and consider this other directory as the new home directory of the container. All containers support this feature. This allows to leave an installed container directory intact (no modifications) and to compartiment all modifications to some directory that you are controlling. Say you wish to automate some functional tests. You can set the new container home to point to your temporary build directory. This is the configuration we call Standalone configuration.
By opposition if you choose to use the default configuration that your container has set up when you installed it, it is called an Existing configuration.
Please note that at the moment Cargo only support Standalone configurations.