Revert "website: latest migration to new structure" (#11634)

Revert "website: latest migration to new structure (#11522)"

This reverts commit 9a89a5f94b.

website/docs/add-secure-apps/providers/proxy/_traefik_ingress.md

@@ -1,52 +0,0 @@
-Create a middleware:
-
-```yaml
-apiVersion: traefik.containo.us/v1alpha1
-kind: Middleware
-metadata:
-    name: authentik
-spec:
-    forwardAuth:
-        address: http://outpost.company:9000/outpost.goauthentik.io/auth/traefik
-        trustForwardHeader: true
-        authResponseHeaders:
-            - X-authentik-username
-            - X-authentik-groups
-            - X-authentik-email
-            - X-authentik-name
-            - X-authentik-uid
-            - X-authentik-jwt
-            - X-authentik-meta-jwks
-            - X-authentik-meta-outpost
-            - X-authentik-meta-provider
-            - X-authentik-meta-app
-            - X-authentik-meta-version
-```
-
-Add the following settings to your IngressRoute
-
-By default traefik does not allow cross-namespace references for middlewares:
-
-See [here](https://doc.traefik.io/traefik/v2.4/providers/kubernetes-crd/#allowcrossnamespace) to enable it.
-
-```yaml
-spec:
-    routes:
-        - kind: Rule
-          match: "Host(`app.company`)"
-          middlewares:
-              - name: authentik
-                namespace: authentik
-          priority: 10
-          services: # Unchanged
-        # This part is only required for single-app setups
-        - kind: Rule
-          match: "Host(`app.company`) && PathPrefix(`/outpost.goauthentik.io/`)"
-          priority: 15
-          services:
-              - kind: Service
-                # Or, to use an external Outpost, create an ExternalName service and reference that here.
-                # See https://kubernetes.io/docs/concepts/services-networking/service/#externalname
-                name: ak-outpost-example-outpost
-                port: 9000
-```