title: Docker-compose - volumes driver local meaning
body: <p>I'm making some docker-compose yml file with <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html" rel="noreferrer">this link</a>. In this config, What does meaning of driver: local in top-level volumes?</p>
  
  <pre><code>volumes:
    esdata1:
      driver: local
    esdata2:
      driver: local
  </code></pre>