Add extra headers to Nginx (#303)

PROXY.md

@@ -39,6 +39,10 @@ server {
   
   location / {
     proxy_pass http://<SERVER>:80;
+    proxy_set_header Host $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 $scheme;
   }
   
   location /notifications/hub {