Merge pull request #124 from jnywong/document-tests-for-dockerfile

Add warning for image-tests when using DockerFile

README.md

@@ -116,6 +116,9 @@ run any Jupyter Notebooks as tests.
 
 This **works with any Jupyter kernel**. This action will use the Jupyter kernel defined in any notebook you put in `image-tests/`. This can be used to execute and test notebooks from any language.
 
+> [!WARNING]  
+> If you are using a Dockerfile to configure your environment, then include `COPY --chown=${NB_USER}:${NB_USER} image-tests ${REPO_DIR}/image-tests` in your Dockerfile to ensure the correct ownership of this folder within the image.
+
 To use automatic image testing, follow these steps:
 
 1. Create a directory named `image-tests/` in your GitHub repository.