document-server-integration/web/documentserver-example/nodejs/config/development-mac.json

{
  "server": {
    "port": 3000,
    "siteUrl": "http://127.0.0.1:8001/",
    "apiUrl": "web-apps/apps/api/documents/api.js",
    "preloaderUrl": "web-apps/apps/api/documents/cache-scripts.html"
  }
}