All services now migrated and tested to be working as intended

These configurations should be valid enough to perform a really fast migration
should something weird happen. Check the runbook created for this commit
to see the steps involved.

playbooks/atlas/nginx-plain-conf/disable-default.yml

@@ -0,0 +1,10 @@
+---
+- hosts: alpha
+  tasks:
+    - name: Disable Default Nginx Site
+      become: yes
+      file:
+        path: /etc/nginx/sites-enabled/default
+        state: absent
+
+