Readded warning to docs

Author: AlexejPenner

docs/book/component-guide/service-connectors/connector-types/docker-service-connector.md

@@ -91,5 +91,8 @@ The 'dockerhub' Docker Service Connector connector was used to successfully conf
 
 The Docker Service Connector can be used by all Container Registry stack component flavors to authenticate to a remote Docker/OCI container registry. This allows container images to be built and published to private container registries without the need to configure explicit Docker credentials in the target environment or the Stack Component.
 
+{% hint style="warning" %}
+ZenML does not yet support automatically configuring Docker credentials in some container runtimes to allow container images to be pulled from the private container registries. This will be added in a future release. In the meantime please make sure your orchestration environment is configured appropriately to pull from the docker registry.
+{% endhint %}
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