title: How to run cesiumjs
body: <p>I followed some instructions,so cesium running locally</p>
  <p><img src="https://i.stack.imgur.com/ygJrg.png" alt="enter image description here" /></p>
  <p>and then did hello world example like this</p>
  <p><img src="https://i.stack.imgur.com/cIzJN.png" alt="enter image description here" /></p>
  <p>But I cannot see anything when i clicked open in browser. I failed constantly</p>
  <p><img src="https://i.stack.imgur.com/tBH9v.png" alt="enter image description here" /></p>
  <p>I don't know what can i do.</p>