Application doesn't finish frontend building in the isolated network

[rusiaikinat]

Environment

Jmix version: 2.7.999-SNAPSHOT

Bug Description

The application and Studio preview doesn't finish frontend building when working in isolated network.

Tue Jan 20 17:42:25 SAMT 2026 INFO - com.vaadin.flow.server.DefaultDeploymentConfiguration: 
Vaadin is running in DEVELOPMENT mode - do not use for production deployments.
Tue Jan 20 17:42:30 SAMT 2026 INFO - com.vaadin.flow.server.frontend.TaskUpdatePackages: using 'C:\Program Files\nodejs\npm.cmd --no-update-notifier --no-audit --scripts-prepend-node-path=true --ignore-scripts install' for frontend package installation