remove docker example

Author: maltesander

docs/modules/commons-operator/pages/reference/environment-variables.adoc

@@ -19,16 +19,3 @@ Please see the documentation xref:guides:kubernetes-cluster-domain.adoc[on confi
 export KUBERNETES_CLUSTER_DOMAIN=mycluster.local
 cargo run -- run
 ----
-
-or via docker:
-
-[source]
-----
-docker run \
---name commons-operator \
---network host \
---env KUBECONFIG=/home/stackable/.kube/config \
---env KUBERNETES_CLUSTER_DOMAIN=mycluster.local \
---mount type=bind,source="$HOME/.kube/config",target="/home/stackable/.kube/config" \
-docker.stackable.tech/stackable/commons-operator:0.0.0-dev
-----