Add an icon for Win-app in Footer

Can anyone tell me how to implement the link to Win-Jitsi-app in the footer? Sorry, but I do not understand the Js/css editing, I stopped writing webpages with pure html years ago and never tried to understand. The link I want to add is “

Thanks for help in the js/css-Jungle :slight_smile:


No Specialist here? Only users like me? PLZ help, dear moderators.

Thanks! Carl