I have following docker-compose.yaml, with this container are unable to discover each other.

services:
  
  uwsgi:
    image: uwsgi:latest
    restart: always
    ports:
      - 8000
    networks:
      - mynetwork

  nginx:
    image: nginx:latest
    restart: always
    ports:
      - 80:80
    volumes:
      - /tmp/docker/nginx.conf:/etc/nginx/conf.d/default.conf
    networks:
      - mynetwork
  
networks:
  mynetwork:
    name: mynetwork

I tried this in nginx container

# nslookup uwsgi
Server:     127.0.0.11
Address:    127.0.0.11#53

Non-authoritative answer:
Name:   uwsgi
Address: 172.21.0.10

and

# telnet uwsgi 8000
Trying 172.21.0.10...
telnet: Unable to connect to remote host: Connection refused

and

# curl uwsgi:8000
curl: (7) Failed to connect to uwsgi port 8000 after 2 ms: Couldn't connect to server