It wasn’t obvious to me at first how to add an image to a dashboard. Turns out to be very simple, but thought I’d note it here in case anyone else is unsure.
You achieve it by using the Add Text widget; because it accepts Markdown, you can embed videos and images to it.
Your image needs to be ‘hosted’ somewhere (eg GitHub repo), but then in your Text widget, just add the URL

@HolisticsTeam, would be good to add some formatting options to the Text Widget box to make it clearer what can & can’t be added, or just to make it a bit easier for those unfamiliar with Markdown