What is the reason to server on localhost, as opposed to default 0.0.0.0?

After looking at the docs: https://www.npmjs.com/package/http-server

I wanted to access my app from another machine.

Existing: "start": "http-server -a localhost -p 8000 -c-1 ./app",

My config: "start": "http-server -a 0.0.0.0 -p 8000 -c-1 ./app",

What is the reason to use localhost in the angular-seed repo?