title: Error by using res.sendfile() in nodejs
body: <p>i m having project on nodejs, im begginer in nodejs.
  when i try to use this</p>
  
  <p><code>app.get('/', function(req, res) res.sendfile('index.html');});</code></p>
  
  <p>its tells me to use <strong>sendFile</strong>( calital <strong>F</strong>).
  And When I use capital F in sendFile, its shows me this error</p>
  
  <pre><code>TypeError: path must be absolute or specify root to res.sendFile
  </code></pre>
  
  <p>   at ServerResponse.sendFile </p>
  
  <p>What should I do anybode help me</p>