Streamlit sharing demo crashes for large data

[AdrianSosic]

The streamlit sharing demo simply crashes when exceeding the memory resources of the provided machine. Maybe we can identify during runtime if the demo is executed locally or in the cloud. In the latter case, we could then show a hint to the user that this is the "online version" of the demo, which is running with limited resources, and prevent the execution for settings that would lead to a crash.