title: Docker named volumes between multiple containers
body: <p>I want to deploy some services into my server and all of them will use nginx as web server, every project has it own .conf file and I want to share all of then with nginx container. I tried to use named volumes but when it's used by more than one container the data gets replaced. I want to get all this .conf files from diferent containers and put in a volume so it can be read by nginx container. I also tried to use subdirectories in named volumes, but, use namedVolumeName/path do not work.</p>
  <p>Obs: I'm using docker-compose in all projects</p>
  <pre><code>version: &quot;3.7&quot;
  
  services:
    backend:
      container_name: jzmimoveis-backend
      image: paulomesquita/jzmimoveis-backend
      command: uwsgi --socket :8000 --wsgi-file jzmimoveis/wsgi.py
      volumes:
        - nginxConfFiles:/app/nginx
        - jzmimoveisFiles:/app/src
      networks:
        - jzmimoveis
      restart: unless-stopped
      expose:
        - 8000
  
    frontend:
      container_name: jzmimoveis-frontend
      image: paulomesquita/jzmimoveis-frontend
      command: serve -s build/
      volumes:
        - nginxConfFiles:/app/nginx
      networks:
        - jzmimoveis
      restart: unless-stopped
      expose:
        - 5000
  
  volumes:
    nginxConfFiles:
      external: true
    jzmimoveisFiles:
      external: true
  networks:
    jzmimoveis:
      external: true
  </code></pre>
  <p>For example, is this case i linked both frontend and backend nginx file to the named volume nginxConfFiles, but, when I do <code>docker-compose up -d</code> in this file, just one of the .conf file appears in volume, I think it gets overwritten by the other container in the same file.</p>