docker_practice/image/demo/buildkit/package.json

{
  "name": "my_app",
  "version": "19.6.0",
  "devDependencies": {
    "webpack": "*",
    "webpack-cli": "*"
  },
  "scripts": {
    "build": "mkdir -p $PWD/dist && cp -r src/* dist/"
  }
}