Updates a README for custom containers.
# Training with Custom Containers
[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
-AI Platform recently added support for training models using user provided docker containers.
-If you're interested in this feature, please contact `cloudml-feedback@google.com` to get early access.
+AI Platform [has added](https://cloud.google.com/ml-engine/docs/release-notes#february_7_2019) support for training models using user provided docker containers.
+
+See the [custom containers documentation](https://cloud.google.com/ml-engine/docs/custom-containers) for more information.
