Fix volume creation through new config

plays/predeploy/lib/volumes.yml

@@ -2,7 +2,7 @@
 - name: Create volume mount directories
   become: true
   file:
-    path: "{{ item }}"
+    path: "{{ item.src }}"
     state: directory
     owner: dokku
     group: dokku
@@ -12,6 +12,6 @@
 - name: Attach volume mounts
   dokku_storage:
     app: "{{ dokku.app }}"
-    mounts: "{{ item }}"
+    mounts: "{{ item.src }}:{{ item.dest }}"
   with_items: "{{ config.volumes }}"
   when: config.volumes