title: Does "--content-base" is deprecated from webpack-dev-server while using webpack v2.2?
body: <p>I started migrating webpack 2.2 here i'm facing issue while configuring webpack-dev-server,my build script is </p>
  
  <pre><code>  "build": "webpack -d &amp;&amp; cp src/index.html dist/index.html &amp;&amp; webpack-dev-server --content-base src/"
  </code></pre>
  
  <p>Getting below error</p>
  
  <pre><code>ERROR in multi (webpack)-dev-server/client?http://localhost:8080 ./src/app/index.js content-base ./src
  Module not found: Error: Can't resolve 'content-base' in 'E:\React\react-basics'
   @ multi (webpack)-dev-server/client?http://localhost:8080 ./src/app/index.js content-base ./src
  
  ERROR in multi (webpack)-dev-server/client?http://localhost:8080 ./src/app/index.js content-base ./src
  Module not found: Error: Can't resolve 'E:\React\react-basics\src' in 'E:\React\react-basics'
   @ multi (webpack)-dev-server/client?http://localhost:8080 ./src/app/index.js content-base ./src
  webpack: Failed to compile.
  </code></pre>
  
  <p>where as if i set my script without <strong>content-base</strong> works properly</p>
  
  <pre><code> "build": "webpack -d &amp;&amp; cp src/index.html dist/index.html &amp;&amp; webpack-dev-server
  </code></pre>
  
  <p>Why this error occurs how to set webpack-dev-server for webpack 2.2?</p>