* Server JSON pages directly from the filesystem.

* Make Json pages even if there's an error.

* Implement much better page serving.

* Use JsonPagesPlugin in the production mode as well.

* Add gzip support for JSON pages.

* Use glob-promise instead of recursive-readdir

* Handle renderStatic 404 properly.

* Simply the gzip code.

* Cache already read JSON pages.

* Change JSON pages extension to .json.

* Fix HMR related issue.

* Fix hot-reload for .json solely on server.

* Properly clear cache on hot-reloader.

* Convert .js pages into .json page right inside the plugin.

* Fix gzipping .json pages.

* Remove unwanted json pages cleanup.

* Get rid of deprecated fs.exists for fs.access