@netlify/framework-info/src/frameworks/create-react-app.json

Framework detection utility

{
  "id": "create-react-app",
  "name": "Create React App",
  "category": "frontend_framework",
  "detect": {
    "npmDependencies": ["react-scripts"],
    "excludedNpmDependencies": [],
    "configFiles": []
  },
  "dev": {
    "command": "react-scripts start",
    "port": 3000,
    "pollingStrategies": [{ "name": "TCP" }, { "name": "HTTP" }]
  },
  "build": {
    "command": "react-scripts build",
    "directory": "build"
  },
  "staticAssetsDirectory": "public",
  "env": { "BROWSER": "none", "PORT": "3000" },
  "plugins": []
}