add instructions for local_docker orch

Author: wjayesh

huggingface-sagemaker/README.md

@@ -101,6 +101,18 @@ make install-stack
 zenml stack hf-sagekamer-local
 ```
 
+Additionally, if you're using the local Docker orchestrator, you'll need to create a cache directory for the datasets and ensure it has the correct permissions:
+
+```shell
+# Create cache directory at project root
+mkdir -p cache/datasets
+
+# Set permissions to allow read/write access
+chmod -R 777 cache
+```
+
+This directory will be mounted into the Docker container and used as a cache for the Hugging Face datasets.
+
 </details>
 
 <details>

huggingface-sagemaker/configs/trainer_config.yaml

@@ -39,6 +39,8 @@ settings:
         memory: "14Gi"
         cpu: "6"
 
+  # you should have a cache/datasets folder in your local machine
+  # for this mount to work.
   orchestrator.local_docker:
     run_args:
       volumes: