The command `oc cluster up` mainly runs code though Docker containers.
However, in pkg/bootstrap/docker/host/host.go, nsenter is used to run
some commands on the host. For this to work on NixOS, we need to provide
the absolute path to the required programs.
- Updated from 1.5.0 to 3.6.0 (this is just the next version, but Red
Hat did quite the version bump there)
- Added 'v' to the version; it is used by `oc cluster up` to determine
which image should be downloaded.
- Added myself as a maintainer.
