title: Create a Dev branch and push the code from local to Dev
body: <p>I have a GitHub Repo (master branch) and also different code done in local folder (with subfolders).</p>
  
  <p>Now I want to use that existing repo and create a Dev branch and push all folders and files (<code>git add .</code>) to that Dev branch.</p>
  
  <p>What is the proper way to do via terminal (commands)?</p>
  
  <p>Thanks</p>