datadog-agent.yml

datadog:
    image: public.ecr.aws/datadog/agent:7
    labels:
        com.datadoghq.ad.logs: '[{"service": "docker_service_name"}]'
    volumes:
      - /proc/:/host/proc/:ro
      - /sys/fs/cgroup/:/host/sys/fs/cgroup:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - /var/lib/docker/containers:/var/lib/docker/containers:ro
    environment:
      DD_API_KEY: ''
      DD_APM_ENABLED: 'true'
      # Logs
      DD_LOGS_ENABLED: 'true'
      DD_DOGSTATSD_NON_LOCAL_TRAFFIC: 'true'
      DD_LOGS_CONFIG_CONTAINER_COLLECT_ALL: 'true'
      DD_CONTAINER_EXCLUDE_LOGS: 'name:datadog-agent'

For Node.js

tracer.init({
    hostname: 'datadog',
    env: 'test'
});