Openai-quickstart-node installation

Hallo everyone,

I’ve installed openai-quickstart-node, i do all thing and every things go well, when i run npm run dev, say
ready - started server on, url:localhost:3000
info - Loaded env from /openai-quickstart-node/.env

if i try to access say me This site can’t be reached…I turn off the firewall i try to check if exist so error but nothing, someone can help me?