Just installed 3.0.2.
Some icons (like /static/images/webhook_icon.jpg) can not be found says browser.
It turns out that this file is currently located in ./web/static/images/webhook_icon.jpg
and the application is looking in ./webapp/dist/images/.
It turns out that new incoming webhook messages get an icon displayed, just not the old ones.
Not a major problem of course.
Kind regards,
Jeroen