Sagemaker examples tab does not pull in example correctly

https://github.com/awslabs/amazon-sagemaker-examples/tree/master/advanced_functionality/custom-training-containers/script-mode-container-2

The notebook here depends on a docker folder, which does not get pulled in. As a result, running the notebook fails

Start with the linked notebook under advanced_functionality/custom-training-containers/script-mode-container-2 and inspect how its docker folder is referenced or fetched. Run the notebook to reproduce the missing-folder failure; done means the required docker folder is pulled in and the notebook runs successfully.

Written by the indexing model from the issue text.