fix: remove deprecated compose version tag

examples/raveberry/docker-compose.yml

@@ -1,6 +1,5 @@
-version: '3'
-
 services:
+
   db:
     image: postgres:16-alpine
     container_name: raveberry-db
@@ -144,8 +143,10 @@ services:
   nginx:
     image: raveberry/raveberry-nginx
     container_name: raveberry-nginx
-    #ports:
-    #  - 9870:80
+    ports:
+      - 9870:80
+    expose:
+      - 80
     environment:
       - DAPHNE_HOST
       - DAPHNE_PORT