cypress.package.json

{
  "scripts": {
    "start": "PORT=3000 react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "serve": "http-server ./build -p 3000 --proxy http://localhost:3000?",
    "cy:open": "CYPRESS_BASE_URL=http://localhost:3000 cypress open",
    "cy:run": "CYPRESS_BASE_URL=http://localhost:3000 cypress run",
    "cy:ci": "start-server-and-test serve http://localhost:3000 cy:run"
  }
}