Add security headers to nginx configuration for enhanced protection

web/client/nginx.conf

@@ -9,6 +9,15 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
+    server_tokens off;
+
+    # Security headers
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-Frame-Options "DENY" always;
+    add_header X-XSS-Protection "0" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
+
     # Serve static files, fallback to index.html for SPA routing
     location / {
         try_files $uri $uri/ /index.html;