npm i -D prettier 

create .prettierrc at root of project and paste below 

{

    "singleQuote": true,

    "tabWidth": 2,

    "trailingComma": "all",

    "jsxBracketSameLine": false,

    "arrowParens": "avoid",

    "printWidth": 100,

    "overrides": [

      {

        "files": "*.json",

        "options": {

          "parser": "json",

          "tabWidth": 4

        }

      },

      {

        "files": "*.md",

        "options": {

          "parser": "markdown",

          "tabWidth": 4

        }

      }

    ]

  }