fix: use vite preview in staging to support api proxy in frontends

devfront/scripts/runtime-mode.sh

@@ -18,8 +18,8 @@ if [ "${1:-}" = "--print-mode" ]; then
 fi
 
 if [ "$mode" = "production" ]; then
-  echo "Running in production mode..."
-  exec sh -c "npm run build && serve -s dist -l 5173"
+  echo "Running in production mode with Vite preview..."
+  exec sh -c "npm run build && npm run preview -- --host 0.0.0.0"
 fi
 
 echo "Running in development mode..."