icon for browser notification

[geeseven]

Is your feature request related to a problem? Please describe. n/a

Describe the solution you'd like It would be nice to see the application icon within browser based notifications.

Describe alternatives you've considered I know dunst (and maybe others) allow customization of notifications including the icon, but it would be nice if the browser just included the icon.

Additional context n/a

[jmattheis]

The functionality should already be implemented but is a little buggy. In https://github.com/gotify/server/blob/master/ui/src/reactions.ts#L16 the image of the message must be looked up from the application store before sending the notification. This should probably fix it.