We don’t wish to publicly expose our Zammad instance when using Chat, so we’ve setup a simple 1:1 proxy with Nginx from a webserver to the Zammad source server - which worked very easily (the JS, CSS and even the WebSocket requests work), but the avatar URLs are absolute to the Zammad host.
Could the avatar image src also use the scriptHost variable (https://github.com/zammad/zammad/blob/33a20f2cf2fc6e2c204110565e22696d7ae4efda/public/assets/chat/chat.js#L73) and pass only a relative URL in the WS response?