old_contents: import config from '../config'
  import base from './webpack-environments/_base'
  
  export default require(`./webpack-environments/${config.env}`)(base)
  
new_contents: import config from '../config'
  import base from './webpack-environments/_base'
  
  // We first load the configuration overrides for the current
  // NODE_ENV and pass it the base (default) webpack configuration
  // file. These overrides should export a function that expect a
  // a configuration object which can be modified to suit the build
  // requirements for that environment.
  export default require(`./webpack-environments/${config.env}`)(base)
  
subject: add note to webpack entry point