title: node server.js throws error
body: <p>running node server.js just throws error like this.
  anyone knows why ??</p>
  
  <pre><code>/xxxxxx/server/node_modules/connect/node_modules/mime/index.js:3
  const Mime = require('./Mime');
  ^^^^^
  SyntaxError: Use of const in strict mode.
      at Module._compile (module.js:439:25)
      at Object.Module._extensions..js (module.js:474:10)
      at Module.load (module.js:356:32)
      at Function.Module._load (module.js:312:12)
      at Module.require (module.js:364:17)
      at require (module.js:380:17)
      at Object.&lt;anonymous&gt; (/xxxxxx/server/node_modules/connect/lib/middleware/static.js:21:12)
      at Module._compile (module.js:456:26)
      at Object.Module._extensions..js (module.js:474:10)
      at Module.load (module.js:356:32)
  </code></pre>