title: How to fix errors that showing when I'm using command npm run build?
body: <p>I try to run <code>npm run build</code> output is below error:</p>
  
  <pre><code>   root@tim-VPCEB42EG:/home/tavinder/es6# npm run build
      npm ERR! Linux 4.15.0-39-generic
      npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "run" "build"
      npm ERR! node v4.2.6
      npm ERR! npm  v3.5.2
  
      npm ERR! missing script: build
      npm ERR! 
      npm ERR! If you need help, you may report this error at:
      npm ERR!     &lt;https://github.com/npm/npm/issues&gt;
  
      npm ERR! Please include the following file with any support request:
      npm ERR!     /home/tavinder/es6/npm-debug.log
  </code></pre>