Running Nginx outside docker container getting error when using custom domain

I’m running a docker container on port 5000. And I use nginx outside the container without using docker options. Now, it’s fine when I access using IP but when I tried to access via my domain name I is not working. On some site I seen that when using I need to add root but, while using it’s not an option right?

    worker_connections 1024;
}
http{
    server {
    listen 80;
    server_name <my-instance-ip-here>;

    location / {
        root /;
        proxy_pass http://0.0.0.0:5000;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}
}```