html-w3c-validator/example/package.json

{
  "name": "example",
  "private": true,
  "scripts": {
    "start": "serve \"./build\"",
    "test:html-w3c-validator": "start-server-and-test \"start\" \"http://127.0.0.1:3000\" \"html-w3c-validator\""
  },
  "devDependencies": {
    "serve": "14.2.0",
    "start-server-and-test": "2.0.0",
    "html-w3c-validator": "file:.."
  }
}