Devcontainer tweaks (#10658)

* Expose port 8000 for InvenTree server container

* Expose dev server on all interfaces

src/frontend/playwright.config.ts

@@ -69,7 +69,7 @@ export default defineConfig({
       timeout: 120 * 1000
     },
     {
-      command: 'invoke dev.server',
+      command: 'invoke dev.server -a 0.0.0.0:8000',
       env: {
         INVENTREE_DEBUG: 'True',
         INVENTREE_LOG_LEVEL: 'WARNING',