Fix IP passthrough

docker/nginx/conf.d/default.conf

@@ -8,6 +8,10 @@ server {
         try_files $uri $uri/ /index.html;
     }
 
+    # Docker reverse proxy IP passthrough
+    set_real_ip_from 172.16.0.0/12;
+    real_ip_header X-Real-IP;
+
     # Force browsers to check for updated data
     location /data/ {
         add_header Cache-Control no-cache;