title: How can I update my network in playground other than Deploy changes?
body: <p>I use 0.19.0 of composer.</p>
  
  <p>when I make some changes in model file,then click <code>Deploy changes</code> button.</p>
  
  <p>This action didn't update the network only, and it had created a new images and startd a new docker container.Finally, my docker will have many container running.</p>
  
  <p>How can I just update the current network in contanier ?</p>