Devcontainer tweaks (#10658)

* Expose port 8000 for InvenTree server container

* Expose dev server on all interfaces

.devcontainer/docker-compose.yml

@@ -18,6 +18,8 @@ services:
       - 6379
 
   inventree:
+    ports:
+      - 8000:8000
     build:
       context: ..
       dockerfile: .devcontainer/Dockerfile