Cannot start NextJS with Nginx

I created a new project written in Next JS,

When opening the browser with an IP and PORT such as "http://127.0.0.1:4321/" it works.

But when I try to connect to it with Nginx through an IP and Route such as "http://127.0.0.1/nextjs/"

The NextJS code is the code you get at the start of a project without changes.

This is the test answer