Fixing up all of the things to make frontend work

roles/frontend/default/main.yml

@@ -0,0 +1,2 @@
+---
+webapp_hosts: []

roles/frontend/vars/main.yml

@@ -1,3 +1 @@
 ---
-# The hosts where nginx proxies ports 3000 and 4000 to
-#webapp_hosts: []

roles/mastodon/tasks/main.yml

@@ -29,7 +29,7 @@
     dest: /home/mastodon/live/docker-compose.yml
   notify: "docker-compose up"
 
-- import_tasks: redis.yaml
+- import_tasks: redis.yml
   when: ansible_hostname == REDIS_HOST
 
 - import_tasks: maintenance.yml