title: Webpack - webpack-dev-server two configs
body: <p>I have a project, which consists of two parts.. an admin environment and a part of web for regular users. Each part has another assets, so I have two configurations for webpack. First is named webpack-front.config.js and second is named webpack-admin.config.js.</p>
  
  <p>My structure:</p>
  
  <pre><code>├─┬ dist
  │ ├── front.bundle.js 
  │ └── admin.bundle.js
  |
  ├─┬ src
  │ ├─┬ front
  | | └── index.js
  │ └─┬ admin
  |   └── index.js
  </code></pre>
  
  <p>Problem starts, when I try to run "webpack-dev-server --open". Npm prints:</p>
  
  <pre><code>&gt; webpack-dev-server --open
  
  No configuration file found and no entry configured via CLI option.
  When using the CLI you need to provide at least two arguments: entry and output.
  A configuration file could be named 'webpack.config.js' in the current directory.
  Use --help to display the CLI options.
  npm ERR! code ELIFECYCLE
  npm ERR! errno 255
  npm ERR! www@1.0.0 start: `webpack-dev-server --open`
  npm ERR! Exit status 255
  npm ERR!
  npm ERR! Failed at the www@1.0.0 start script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     /root/.npm/_logs/2017-12-04T14_16_35_084Z-debug.log
  </code></pre>
  
  <p>This problem occurs because my configs are not named "webpack.config.js". Is there any way, how to run webpack-dev-server with another config or with both configs at once?</p>