Starter Premium Plan Features

Hello, can you tell me if the Starter Premium plan ($2.50) includes support for: Is it possible to launch a Node.js 18+ app with npm start and keep it running? Are WebSockets / Socket.io supported for multiplayer? Can I link the app to tools72.infinityfree.me or only to a separate domain/subdomain? Is there SSH or is it only possible to upload via File Manager + cPanel Node? Limits: RAM, process runtime, cron (for restarting if it crashes).