title: angular not compiling with sass/scss
body: <p>I'm new to angular and just installed it. Now i'm made new app with scss and when trying to use </p>
  
  <pre><code>ng serve
  </code></pre>
  
  <p>i'm getting next error</p>
  
  <pre><code>ERROR in ./src/styles.sass (./node_modules/@angular-devkit/build-angular/src/angular-cli-files/plugins/raw-css-loader.js!./node_modules/postcss-loader/src??embedded!./node_modules/sass-loader/lib/loader.js??ref--14-3!./src/styles.sass)
  Module build failed (from ./node_modules/sass-loader/lib/loader.js):
  Error: Cannot find module 'node-sass'
      at Function.Module._resolveFilename (internal/modules/cjs/loader.js:587:15)
      at Function.Module._load (internal/modules/cjs/loader.js:513:25)
      at Module.require (internal/modules/cjs/loader.js:643:17)
      at require (internal/modules/cjs/helpers.js:22:18)
      at Object.sassLoader (C:\OpenServer2\OSPanel\domains\ng2\node_modules\sass-loader\lib\loader.js:46:72)
  i ｢wdm｣: Failed to compile.
  </code></pre>
  
  <p>If I create new app with css all works fine so most of ways to re-intall angular, python, windows-build-tools and etc didn't worked.
  How i can handle with this? </p>