Elasticsearch does not log kibana due to filebeat

Question

I'm trying to use Elasticsearch for logging. I did a little research and implemented some code in the application, which was developed with .NET 7. All services run almost without any problems. However, I can't see the logs in Kibana. I see the following warning in the log section: Set up Filebeat (opens in a new tab or window), then configure your Elasticsearch output for your monitoring cluster.

My docker-compose files:

docker-compose.yml

version: '3.4'

networks:
   backend:
   fronted:

volumes:
  esdata:
    driver: local

include:
   - "external-services.yml"
   - "internal-services.yml"

Part of external-services.yml:

  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:8.9.1
    environment:
      - xpack.security.enabled=false 
      - discovery.type=single-node
      - xpack.monitoring.collection.enabled=true
    ports:
      - "9200:9200"
    volumes:
      - esdata:/usr/share/elasticsearch/data
    networks:
      - backend

  kibana:
    image: docker.elastic.co/kibana/kibana:8.9.1
    ports:
      - "5601:5601"
    networks:
      - backend
    depends_on:
      - elasticsearch

  filebeat:
    image: docker.elastic.co/beats/filebeat:8.9.1
    user: root
    environment:
      - output.elasticsearch.hosts=["elasticsearch:9200"]
    networks:
      - backend
    depends_on:
      - elasticsearch
    volumes:
      - esdata:/var/log/app/

How can I fix that?