Update nginx.conf

Author: BotellaA

nginx.conf

@@ -19,9 +19,21 @@ http {
 
     client_max_body_size 0;
 
-    add_header Access-Control-Allow-Origin $allow_origin;
-    add_header Access-Control-Allow-Credentials true;
-    add_header Vary Origin;
+    # === CORS configuration for ALL locations ===
+    add_header 'Access-Control-Allow-Origin'      $allow_origin always;
+    add_header 'Access-Control-Allow-Credentials' 'true' always;
+    add_header 'Access-Control-Allow-Methods'     'GET, POST, PUT, DELETE, PATCH, OPTIONS' always;
+    add_header 'Access-Control-Allow-Headers'     'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,X-CSRF-Token' always;
+    add_header 'Access-Control-Expose-Headers'    'Content-Length,Content-Range' always;
+    add_header 'Vary'                             'Origin' always;
+
+    # Handle preflight OPTIONS requests globally (very important!)
+    if ($request_method = 'OPTIONS') {
+      add_header 'Access-Control-Max-Age' 1728000;   # Cache preflight for 20 days
+      add_header 'Content-Type' 'text/plain; charset=utf-8';
+      add_header 'Content-Length' 0;
+      return 204;   # No Content — standard for preflight
+    }
 
     location ~ "^/geode/" {
       if ($request_method !~ ^(DELETE|GET|POST|PUT|OPTIONS)$) {