Add a proxy rule for the lms-xml app.

playbooks/roles/nginx/templates/lms-xml.j2

@@ -20,6 +20,16 @@ server {
     proxy_pass http://lms-xml-backend;
   }
 
+  location @proxy_to_lms-xml_app {
+    proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
+    proxy_set_header X-Forwarded-Port $http_x_forwarded_port;
+    proxy_set_header X-Forwarded-For $http_x_forwarded_for;
+    proxy_set_header Host $http_host;
+
+    proxy_redirect off;
+    proxy_pass http://lms-xml-backend;
+  }
+
   location / {
     try_files $uri @proxy_to_lms-xml_app;
   }