Contributing section instructions missing webpack step

[ferrx]

From https://github.com/aspnet/JavaScriptServices#contributing

If you're interested in contributing to the various packages, samples, and project templates in this repo, that's great! You can run the code in this repo just by:

Cloning the repo
Running dotnet restore at the repo root dir
Going to whatever sample or template you want to run (for example, cd templates/Angular2Spa)
Restoring NPM dependencies (run npm install)
Launching it (dotnet run)

You can reproduce this error by following the current directions.

After performing these steps, the wwwroot directory is empty (except for a favicon). The step to bundle js/css is never performed. You will get an error when navigating to localhost:5000 with logs showing that the bundled js/css requests are coming back with 404 errors.

Either include a step for dotnet publish which performs the required webpack commands AND npm install, or explicitly include the two webpack commands as steps. I think the difference would be that dotnet publish will set the environment to production whereas it may be in development by default. If going with the former, removing the npm install direction in the contributor notes would be possible.

[SteveSandersonMS]

Thanks - have updated the instructions.