title: How to add vue-cli to the existing project?
body: <p>I have a project on Vue.js using Webpack. And I want to add vue-cli features to it so I can work with it like I do with vue-cli generate project. But I don't know how to integrate vue-cli with existing project.</p>
  
  <p>With new project I can do <code>vue create &lt;project-name</code> but I couldn't find the instruction on integrating it with existing projects. Is there an official way to do so? (I suppose I can just create the new project and move all of the sources there, but still probably there's a better way to do it)</p>