Use name instead of id to inspect container

bin/volume.php

@@ -3,9 +3,7 @@
 
 function readContainerConfig() {
   try {
-    $output = [];
-    exec('basename "$(cat /proc/1/cpuset)"', $output);
-    $id = reset($output);
+    $id = getenv('COMPOSE_PROJECT_NAME') . '_l3d';
     $output = [];
     exec('docker container inspect ' . $id, $output);
     return json_decode(implode('', $output), TRUE)[0];