v22 cluster-setup refers to getting started for simple setup, also cluster-types omits command lines

[damonfeldman]

The page https://dgraph.io/docs/deploy/cluster-setup/ says "Tip For a single server setup, recommended for new users, please see Get Started page." but that page is about querying and no longer has any setup info.

The place I find instructions for a single-server setup is actually under "Learning Environment" tab here: https://dgraph.io/docs/installation/single-host-setup/ .

The https://dgraph.io/docs/installation/kubernetes/cluster-types/ page also has a single-node setup section that omits the actual "dgraph alpha" and "dgraph zero" command lines, so that page should point to the single-host-setup page (which has command lines) under "learning environment."