{ "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": "14.2.1", "start-server-and-test": "2.0.3", "html-w3c-validator": "file:.." } }