Make it very easy for a user to explore the app

[MarcSkovMadsen]

I just tried out the app on Binder. But I was not able to use it. I tried downloading and using some of the sample files but I did not manage to get anything working.

For a user just exploring the app its very text heavy and depends on files on their local drive.

The application would be easier to try out if a an example file was directly provided, a link to more files was provided and you could use drag-and-drop FileInput instead of finding files in your local or the servers file directory.

Also if the docs included some kind of visualization or video it would be easier to understand how it works.