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

{
  "solution": {
    "name": "search-wp-spfx-client-side-solution",
    "id": "65493d61-9d21-46e7-bc08-23ea857b4c95",
    "version": "1.0.0.0"
  },
  "paths": {
    "zippedPackage": "search-wp-spfx.spapp"
  }
}