docs: disable MD013 markdownlint to check line length

.markdownlint.json

@@ -2,5 +2,6 @@
   "heading-style": { "style": "atx" },
   "ul-style": { "style": "dash" },
   "line-length": { "line_length": 120, "stern": true },
-  "hr-style": { "style": "---" }
+  "hr-style": { "style": "---" },
+  "MD013": false
 }

docs/content/customization/generic/global-mirror.md

@@ -4,8 +4,7 @@ title = "Global Image Registry Mirror"
 
 Add containerd image registry mirror configuration to all Nodes in the cluster.
 
-When the `globalImageRegistryMirror` variable is set, `files` with configurations for
-[Containerd default mirror](https://github.com/containerd/containerd/blob/main/docs/hosts.md#setup-default-mirror-for-all-registries) will be added.
+When the `globalImageRegistryMirror` variable is set, `files` with configurations for [Containerd default mirror](https://github.com/containerd/containerd/blob/main/docs/hosts.md#setup-default-mirror-for-all-registries) will be added.
 
 This customization will be available when the
 [provider-specific cluster configuration patch]({{< ref "..">}}) is included in the `ClusterClass`.

docs/content/customization/generic/image-registries.md

@@ -41,63 +41,3 @@ spec:
 
 Applying this configuration will result in new files and preKubeadmCommands
 on the `KubeadmControlPlaneTemplate` and `KubeadmConfigTemplate`.
-
-To use a image registry as mirror with CA certificate, specify the following configuration:
-
-If your registry mirror requires self signed CA certifate, create a Kubernetes Secret with keys for `ca.crt`:
-
-```shell
-kubectl create secret generic my-mirror-ca-cert-secret \
-  --from-file=ca.crt=registry-ca.crt
-```
-
-```yaml
-apiVersion: cluster.x-k8s.io/v1beta1
-kind: Cluster
-metadata:
-  name: <NAME>
-spec:
-  topology:
-    variables:
-      - name: clusterConfig
-        value:
-          imageRegistries:
-            - url: https://my-registry.io
-              credentials:
-                secretRef:
-                  name: my-registry-credentials
-              mirror:
-                secretRef:
-                  name: my-mirror-ca-cert-secret
-```
-
-Applying this configuration will result in following new files on the
-`KubeadmControlPlaneTemplate` and `KubeadmConfigTemplate`
-
-- `/etc/containerd/certs.d/_default/hosts.toml`
-- `/etc/certs/mirror.pem`
-
-To use a public hosted image registry (ex. ECR) as mirror, specify the following configuration:
-
-```yaml
-apiVersion: cluster.x-k8s.io/v1beta1
-kind: Cluster
-metadata:
-  name: <NAME>
-spec:
-  topology:
-    variables:
-      - name: clusterConfig
-        value:
-          imageRegistries:
-            - url: https://123456789.dkr.ecr.us-east-1.amazonaws.com
-              credentials:
-                secretRef:
-                  name: my-registry-credentials
-              mirror: {}
-```
-
-Applying this configuration will result in following new files on the
-`KubeadmControlPlaneTemplate` and `KubeadmConfigTemplate`
-
-- `/etc/containerd/certs.d/_default/hosts.toml`