Fix proxy config (#98)

* Fix proxy config

* Add padding

* delete LF

Author: KireevDmitry

config/nginx/includes/http-common.conf

@@ -14,6 +14,10 @@ map $http_x_forwarded_host $the_host {
     "" $this_host;
 }
 
+map $http_x_forwarded_prefix $the_prefix {
+    default $http_x_forwarded_prefix;
+}
+
 map $http_upgrade $proxy_connection {
   default upgrade;
   "" close;