Revert "Remove proxying headers from the auth service."

This reverts commit 95403974.

conf.d/auth.shore.co.il.conf

@@ -23,6 +23,7 @@ server {
     location / {
         proxy_pass              http://$auth:8080$request_uri;
         proxy_http_version      1.1;
+        include                 snippets/proxy-headers.conf;
         include                 snippets/allow-shore-ips.conf;
     }
 }