create cache directory on host only if required

roles/matrix-nginx-proxy/tasks/setup_nginx_proxy.yml

@@ -12,16 +12,16 @@
 #
 - name: Ensure Matrix nginx-proxy paths exist
   file:
-    path: "{{ item }}"
+    path: "{{ item.directory }}"
     state: directory
     mode: 0750
     owner: "{{ matrix_user_username }}"
     group: "{{ matrix_user_groupname }}"
   with_items:
-    - "{{ matrix_nginx_proxy_base_path }}"
-    - "{{ matrix_nginx_proxy_data_path }}"
-    - "{{ matrix_nginx_proxy_confd_path }}"
-    - "{{ matrix_nginx_proxy_synapse_cache_path }}"
+    - { directory: "{{ matrix_nginx_proxy_base_path }}"}
+    - { directory: "{{ matrix_nginx_proxy_data_path }}"}
+    - { directory: "{{ matrix_nginx_proxy_confd_path }}"}
+    - { directory: "{{ matrix_nginx_proxy_synapse_cache_path }}", when: matrix_nginx_proxy_synapse_cache_enabled and not matrix_nginx_proxy_enabled }
 
 - name: Ensure Matrix nginx-proxy configured (main config override)
   template: