title: how do I set up next.config.js so that the class name only contains hash?
body: <p>I use next.js and css modules. node-sass and @zeit/next-sass I don't want to use. Can you please tell us how to configure next.config.js so that the class name only contains hash?
  package.json:</p>
  
  <pre><code>{
    "name": "learn-starter",
    "version": "0.1.0",
    "private": true,
    "scripts": {
      "dev": "next dev",
      "build": "next build",
      "start": "next start"
    },
    "dependencies": {
      "next": "9.3.5",
      "react": "16.13.1",
      "react-dom": "16.13.1",
      "sass": "^1.26.8"
    }
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/Fxk0S.png" rel="nofollow noreferrer">image example</a></p>