Migrate to quadlets

roles/mastodon/templates/redis.container.j2

@@ -0,0 +1,15 @@
+[Unit]
+Description=Mastodon Redis
+
+[Container]
+ContainerName=redis
+Image=docker.io/library/redis:7
+Network=mastodon_internal.network
+Volume=/home/apps/mastodon/redis:/data:Z
+HealthCmd=redis-cli ping
+
+[Service]
+Restart=always
+
+[Install]
+WantedBy=default.target