* removed gulp leftover tasks * added static task   * clean:static   * static:copyBuildFiles * refactored getAssetPathsAsync (now in /utils) * added /stack/static/getStaticIndexHtml({css, js})
* removed gulp leftover tasks
* added static task
  * clean:static
  * static:copyBuildFiles
* refactored getAssetPathsAsync (now in /utils)
* added /stack/static/getStaticIndexHtml({css, js})

TBD:
* use new getAssetPathsAsync in server/frontend/render
* workaround for api-calls in static build (if STATIC) express.static instead of productionServer

DoubleU23/tailored-react-env