setting concurrently in package.json of bak-end code example

Example 1: concurrently node react

{
    "scripts": {
        "server": "node index.js",
        "client": "npm start --prefix client",
        "dev": "concurrently \"npm run server\" \"npm run client\""
    }
}

Example 2: concurrently node react

npm i -D concurrently