sp-dev-fx-webparts/samples/react-app-settings/config/package-solution.json

{
  "solution": {
    "name": "react-app-settings-client-side-solution",
    "id": "9573efb7-06d1-4134-aa8d-f6b4803d6096",
    "version": "1.0.0.0"
  },
  "paths": {
    "zippedPackage": "solution/react-app-settings.sppkg"
  }
}