slate/index.js

const path = require("path");
const dirPath = path.join(__dirname);
require("@babel/register")({
  presets: [
    [require.resolve("@babel/preset-env")],
    [
      require.resolve("next/babel"),
      {
        "preset-env": {},
        "transform-runtime": {},
        "styled-jsx": {},
        "class-properties": {},
      },
    ],
  ],
  plugins: [
    [require.resolve("@babel/plugin-transform-runtime")],
    [
      require.resolve("babel-plugin-module-resolver"),
      {
        alias: {
          "~": dirPath,
        },
      },
    ],
  ],
  ignore: ["node_modules", ".next"],
});

module.exports = require("./server.js");