title: docker-compose creates directory instead of file
body: <p>I'm trying to setup my home server (Ubuntu 18.04 LTS) using some docker containers and docker-compose. While trying to setup the "transmission-rss" I get the following error:</p>
  
  <pre><code>/usr/local/lib/ruby/2.6.0/psych.rb:577:in `initialize': Is a directory @ io_fillbuf - fd:5 /etc/transmission-rss.conf (Errno::EISDIR)
  </code></pre>
  
  <p>And when I went to check if the <code>transmission-rss.conf</code> file had been created a directory with the same name was created in its place.</p>
  
  <p>I have to run the <code>docker-compose up</code> command using <code>sudo</code> so I don't know if this has anything to do with permissions.</p>
  
  <p>Here is my current docker-compose.yml file:</p>
  
  <pre><code>version: '3'
  services:
    portainer:
      container_name: portainer
      image: portainer/portainer
      volumes:
        - '/home/miguel/docker/portainer/data/:/data'
        - '/home/miguel/docker/portainer/socket/:/var/run/docker.sock'
      ports:
        - "9000:9000"
      restart: always
    transmission-rss:
      container_name: transmission-rss
      image: nning2/transmission-rss:latest
      volumes:
        - '/home/miguel/docker/transmission-rss/transmission-rss.conf/:/etc/transmission-rss.conf/'
      restart: unless-stopped
  </code></pre>
  
  <p>The <code>portainer</code> container starts fine.</p>
  
  <p>Thank you very much,
  Miguel</p>