How can i access localhost:3000 inside container

Hi, i am working a Nuxt JS project. My project located in data/www/my-proj/htdocs/. The problem is when this project built in development mode (npm run dev), it will use the url http://localhost:3000 and i do not know how to access that url in my PC. I am using window 10.

What you are looking for is described here: