title: Webpack-dev-server not sending requests to external domain via proxy
body: <p>I'm trying to use the webpack-dev-server proxy configuration to send api requests to an external domain and I can't seem to get it working. </p>
  
  <p>Here's my config:</p>
  
  <pre><code>var path = require('path')
  
  module.exports = {
      entry: './client/index.js',
      output: {
          filename: 'bundle.js',
          path: path.resolve(__dirname, 'public/assets'),
          publicPath: 'assets'
      },
      devServer: {
          contentBase: 'public',
          proxy:{
              '/api/v1*': {
                  target: 'http://laravelandwebpack.demo/',
                  secure: false
              }
          }
      }
  }
  </code></pre>
  
  <p>So, anytime my app makes a request with the uri <code>/api/v1...</code> it should send that request to <code>http://laravelandwebpack.demo</code>. </p>
  
  <p>In my Vue app, I'm using the <code>vue-resource</code> to make the requests and I'm defaulting all requests with the needed uri prefix:</p>
  
  <pre><code>var Vue = require('vue')
  Vue.use(require('vue-resource'))
  
  new Vue({
      el: 'body',
      http: {
          root: '/api/v1', // prefix all requests with this
          headers:{
              test: 'testheader'
          }
      },
      ready: function (){
          this.$http({
              url: 'tasks',
              method: 'GET'
          }).then(function (response){
              console.log(response);
          }, function (response){
              console.error(response);
          })
      }
  })
  </code></pre>
  
  <p>The URL's are being constructed correctly, but they're still pointing to <code>localhost:8080</code> which is the webpack-dev-server:</p>
  
  <p><a href="https://i.stack.imgur.com/5On8d.png" rel="noreferrer"><img src="https://i.stack.imgur.com/5On8d.png" alt="Errant http request"></a></p>
  
  <p>I read and re-read the docs for webpack-dev-server and I can't figure out where I have it set up wrong. Any ideas?</p>