Add an nginx container to do crazy things with traefik

ansible/roles/traefik/files/nginx.conf

@@ -0,0 +1,14 @@
+# NOTE: Use `$http_x_forwarded_host` intead of `$host`.
+
+server {
+    listen 80 default_server;
+
+    # Get IP correctly
+    real_ip_header X-Forwarded-For;
+    set_real_ip_from 0.0.0.0/0;
+
+    # Allow everything through by default
+    location / {
+        return 200;
+    }
+}