A HTML rendering dashboard widget

⚙ Configure via Settings > Administration > Theming > htmlbox widget

📄 Paste HTML-Code to be shown in the dashboard widget in the textinput field.

Once the app is installed, if you want the HtmlWidget to be displayed by default on new users dashboard, change the default dashboard layout:

occ config:app:set dashboard layout --value=htmlwidget,recommendations,spreed,mail,calendar