title: can not run npm run build/deploy
body: <p>I'm trying to deploy my application but is not working. 
  My package.json scripts:</p>
  
  <pre><code>"scripts": {
  "serve": "live-server public --port=8091",
  "build": "webpack",
  "dev-server": "webpack-dev-server",
  "predeploy": "npm run build",
  "deploy": "gh-pages -d build"
  </code></pre>
  
  <p>Error when i run npm run deploy:</p>
  
  <pre><code>ENOENT: no such file or directory, stat 'C:\Users\Luiz\Desktop\udemy\react-course-projects\indecision-app\build'
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! indecision-app@1.0.0 deploy: `gh-pages -d build`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the indecision-app@1.0.0 deploy script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  </code></pre>