Lookup on 192.168.65.5:53: no such host – Nginx

I try to run nginx in docker and connect it to one service in docker as well. Another service is running without docker and use this nginx too. My docker-compose:

version: "3.9"

services:
  nginx:
    restart: always
    image: nginx
    volumes:
      - ./config/nginx.conf:/etc/nginx/nginx.conf:ro
    ports:
      - "3000:80"
      - "9000:81"

  web:
    restart: always
    image: "xxxx/xxxx/web"

And nginx conf at ./config/nginx.conf:

events {}

http{
    upstream ws-api {
        server host.docker.internal:8081;
    }

    upstream ws-web {
        server web;
    }



    server {
        server_name localhost;
        listen      80;
     
        location / {
            include fastcgi_params;
            fastcgi_split_path_info ^(/)(.*)$;
            fastcgi_param PATH_INFO $fastcgi_path_info;
            fastcgi_param SCRIPT_NAME $fastcgi_script_name;
            fastcgi_pass  ws-api;
        }
    }

    server {
        server_name localhost;
        listen      81;
     
        location / {
            include fastcgi_params;
            proxy_pass http://ws-web;
        }

        location /api {
            rewrite        ^([^.]*[^/])$ $1/;
            rewrite        ^/api(.*)$ $1 break;

            include fastcgi_params;
            fastcgi_split_path_info ^(/)(.*)$;
            fastcgi_param PATH_INFO $fastcgi_path_info;
            fastcgi_param SCRIPT_NAME $fastcgi_script_name;
            fastcgi_pass  ws-api;
        }
    }
}

When I open localhost:9000 I get the error message:

lookup ws-web on 192.168.65.5:53: no such host

localhost:3000 works fine

What is my mistake?