Updated nextcloud to use docker network and caddy

nextcloud/roles/network/tasks/main.yaml

@@ -0,0 +1,11 @@
+---
+- name: "Ensure {{ container_name }} Docker network exists"
+  docker_network:
+    name: "{{ docker_network }}"
+    state: present
+    connected:
+      - "{{ caddy_container }}"
+      - "{{ postgres_container }}"
+      - name: "{{ redis_container }}"
+        alias: redis
+    appends: yes