* Allow etags to be disabled with config option
- CR Change: Rename option to generateEtags
- CR Change: Add tests for etag generation
- CR Change: Refactor to use next.config.js
- Update documentation
* Use renderOpts instead of passing nextConfig
* Allow next/asset to work properly with dynamic assetPrefix
Now we use webpack's publicPath via client side.
* Add test cases for dynamic assetPrefix and next/asset.