How do I solve "Greetings, time traveller. We are in the golden age of prefix-less CSS, where Autoprefixer is no longer needed for your stylesheet."?

In my Next.JS app I import my stylesheet in _app.js like this:

import '../public/css/Index.css';

Index.css contains this:

.index-container {
    margin: 20px auto 0;
}

How do I solve the error message:

./src/public/css/Index.css (./node_modules/css-loader/dist/cjs.js??ref--5-oneOf-5-1!./node_modules/next/dist/compiled/postcss-loader??__nextjs_postcss!./src/public/css/Index.css) Warning

Greetings, time traveller. We are in the golden age of prefix-less CSS, where Autoprefixer is no longer needed for your stylesheet.

Your issue can be solved package.json by applying code below:

 "browserslist": {
    "production": [
      ">0.3%",
      "not ie 11",
      "not dead", 
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version",
      ">0.3%",
      "not ie 11",
      "not dead", 
      "not op_mini all"
    ]
  }

After you have made these changes restart your server. you will no longer get this warning.