package.json

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"devDependencies": {
    "@babel/core": "^7.5.5",
    "@babel/preset-env": "^7.5.5",
    "@babel/register": "^7.5.5"
}

.babelrc

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{
  "presets": ["@babel/preset-env"]
}

entry point node.js app

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require("@babel/register")({})
    
// Import the rest of our application.
module.exports = require('./index.js')

Link How To Enable ES6 Imports in Node.JS https://timonweb.com/posts/how-to-enable-es6-imports-in-nodejs/