collect kube versions into a single file

CONTRIBUTING.md

@@ -9,7 +9,7 @@ This project uses [flakes](https://nixos.wiki/wiki/Flakes) so a development envi
 
     nix develop
 
-where you will find a [devshell](https://numtide.github.io/devshell) prompt (which supports [direnv](https://direnv.net/) so a one-time `direnv allow` at the base of the repo should automate the dev shell process).
+> **NOTE**: there's also support for [direnv](https://direnv.net/) to automate the dev shell process
 
 ## Commits
 
@@ -23,15 +23,11 @@ Do try to format the repo with [treefmt](https://github.com/numtide/treefmt) bef
 
 To support a new Kubernetes version:
 
-- Edit [`./jobs/generators/default.nix`](./jobs/generators/default.nix) and add a block for the version under `k8s`; for example:
+- Edit [`./versions.nix`](./versions.nix) and add a new attribute for the version; for example:
 
   ```nix
   {
-    name = "v1.23.nix";
-    path = generateK8S "v1.23" (builtins.fetchurl {
-      url = "https://github.com/kubernetes/kubernetes/raw/v1.23.0/api/openapi-spec/swagger.json";
-      sha256 = "0jivg8nlxka1y7gzqpcxkmbvhcbxynyrxmjn0blky30q5064wx2a";
-    });
+    "1.23.0" = "sha256:0jivg8nlxka1y7gzqpcxkmbvhcbxynyrxmjn0blky30q5064wx2a";
   }
   ```
 
@@ -40,9 +36,6 @@ To support a new Kubernetes version:
       nix build '.#jobs.x86_64-linux.generators.k8s'
       cp ./result/* modules/generated/
 
-- Add the version in [`./modules/k8s.nix`](./modules/k8s.nix) under `options.kubernetes.version.type`
-- Add a new check in [`./flake.nix`](./flake.nix) (e.g., `tests-k8s-1_23`)
-
 ## Tests
 
 Tests are executed through GitHub actions; see the [workflow definition](../kubenix/.github/workflows/ci.yml) for commands.