Fix missing serverstransport documentation

docs/content/routing/providers/docker.md

@@ -285,6 +285,14 @@ you'd add the label `traefik.http.services.<name-of-your-choice>.loadbalancer.pa
     - "traefik.http.services.myservice.loadbalancer.server.scheme=http"
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.serverstransport`"
+
+    See [serverstransport](../services/index.md#serverstransport) for more information.
+
+    ```yaml
+    - "traefik.http.services.<service_name>.loadbalancer.serverstransport=foobar"
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.passhostheader`"
 
     See [pass Host header](../services/index.md#pass-host-header) for more information.

docs/content/routing/providers/kubernetes-crd.md

@@ -335,6 +335,7 @@ Register the `IngressRoute` [kind](../../reference/dynamic-configuration/kuberne
           responseForwarding:
             flushInterval: 1ms
           scheme: https
+          serversTransport: transport
           sticky:
             cookie:
               httpOnly: true

docs/content/routing/services/index.md

@@ -462,7 +462,7 @@ By default, `passHostHeader` is true.
 
 #### ServersTransport
 
-`serversTransport` allows to reference a ServersTransport configuration for the communication between Traefik and your servers.
+`serversTransport` allows to reference a [ServersTransport](./index.md#serverstransport_1) configuration for the communication between Traefik and your servers.
 
 ??? example "Specify a transport -- Using the [File Provider](../../providers/file.md)"