Fix duplicated resource when using volume
diff --git a/docker/client/stack.sls b/docker/client/stack.sls
index f49bda4..4671735 100644
--- a/docker/client/stack.sls
+++ b/docker/client/stack.sls
@@ -54,7 +54,7 @@
         {%- endif %}
 
         {%- if path is defined %}
-docker_{{ app }}_volume_{{ path }}:
+docker_{{ app }}_{{ name }}_volume_{{ path }}:
   file.directory:
     - name: {{ path }}
     - makedirs: true