js 文件如何用命令执行？

我有个文件，姑且叫a.js吧，本地环境：nodejs pnpm yarn npm ，我想运行起来，用啥命令？类似package.json里面的script来执行，如下所示：

"scripts": {
    "dev": "next dev",
    "build": "next build"
}

a.js

import fs from "fs";
import { extractStyle } from "@ant-design/static-style-extract";
// import withTheme from "../theme";

const outputPath = "/public/antd.min.css";

// 1. default theme

// const css = extractStyle();

// 2. With custom theme

const css = extractStyle();

fs.writeFileSync(outputPath, css);

console.log(`🎉 Antd CSS generated at ${outputPath}`);