fix

frontend/nginx.conf

@@ -4,6 +4,11 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
+    # MIME types for JavaScript modules
+    location ~* \.js$ {
+        add_header Content-Type application/javascript;
+    }
+
     # SPA fallback
     location / {
         try_files $uri $uri/ /index.html;