title: Shiny proxy : Connect to localhost:2375 failed - Connection refused
body: <p>When I am trying to start application in shinyproxy I get the following error<br>
  <code>Caused by: java.util.concurrent.ExecutionException: javax.ws.rs.ProcessingException: org.apache.http.conn.HttpHostConnectException: Connect to localhost:2375 [localhost/127.0.0.1] failed: Connection refused (Connection refus</code>ed)  </p>
  
  <ul>
  <li>OS - rhel 7.1  </li>
  </ul>
  
  <p><strong>Docker.service file</strong></p>
  
  <pre><code>ExecStart=/usr/bin/dockerd-current \  
          /usr/bin/dockerd -H fd:// -D -H tcp://127.0.0.1:2375 \    
          –add-runtime docker-runc=/usr/libexec/docker/docker-runc-current \  
          –default-runtime=docker-runc \  
          –authorization-plugin=rhel-push-plugin \  
          –exec-opt native.cgroupdriver=systemd \  
          –userland-proxy-path=/usr/libexec/docker/docker-proxy-current \ 
  </code></pre>