changed cast container service image source and specified network mode

dependent/compose.yml

@@ -303,11 +303,12 @@ services:
       glance.description: Pastebin server
 
   cast:
-    image: ghcr.io/owncast/owncast:latest
+    image: docker.io/owncast/owncast:latest
     restart: unless-stopped
     ports:
       - "8080:8080"
       - "1935:1935"
+    network_mode: "container:wgclient"
     volumes:
       - ~/.local/owncast:/app/data:Z
     env_file: