ensure react is only loaded once via webpack alias

[ds82]

somehting like this:

  config.resolve.alias['react'] = path.resolve(
    __dirname,
    '../',
    'node_modules/react'
  );
  config.resolve.alias['react-dom'] = path.resolve(
    __dirname,
    '../',
    'node_modules/react-dom'
  );
  config.resolve.alias['prop-types'] = path.resolve(
    __dirname,
    '../',
    'node_modules/prop-types'
  );```