title: tsconfig outfile with systemjs
body: <p>I have the exact same issue as here:
  <a href="https://stackoverflow.com/questions/39715307/systemjs-loading-build-file/39739892">SystemJS: loading build file</a></p>
  
  <p>however I am getting a network error because I assume systemjs is trying to download main from the web but it does not exist on the web which is right because it is inside the buildjs file which has already been downloade dinto the browser</p>
  
  <p>how do I make systemjs look inside the already downloaded buildjs file only and not try and download it over the network?</p>