Pass the full host to the backend, fixes #372

core/nginx/conf/proxy.conf

@@ -1,5 +1,5 @@
 # Default proxy setup
-proxy_set_header Host $host;
+proxy_set_header Host $http_host;
 proxy_set_header X-Real-IP $remote_addr;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 proxy_set_header X-Forwarded-Proto $proxy_x_forwarded_proto;