anchor.diff:  :: 1. Build Webapp
   :: .a Install Yarn
   echo Prepare environment to build WebApp
  -call :ExecuteCmd !NPM_CMD! install yarn -g
  +call :ExecuteCmd %NPM_CMD% install yarn -g
   :: .b Enter app dir
   pushd %DEPLOYMENT_SOURCE%\app
   :: .c Install Dependencies
  
positive.code: SET MSBUILD_PATH=%ProgramFiles(x86)%\MSBuild\14.0\Bin\MSBuild.exe
  :MsbuildPathDefined
  
  ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
  :: Custom steps
  :: ----------
  
negative.code:   goto error
  )
  
  :: Setup
  :: -----
  
  