title: gcloud app engine: How do i simply update source code of my PHP app?
body: <p>When I've initialized my PHP Project in gcloud I used the following command:</p>
  
  <pre><code>gcloud app deploy
  </code></pre>
  
  <p>as far as I understood that, it creates an image of a managed VM installs it in gcloud. This image also contains my source code. The deploy process can take a few minutes.</p>
  
  <p>Since there are some use cases I can't test on my local machine, I need to test the deployed app.</p>
  
  <p>So here's my question: Since the source code changes a lot during development and there's the necessity to test the changes again and again, oftenly in short intervals, do I always have to <code>deploy</code> the app?</p>
  
  <p>Waiting a few minutes for deploying after a minor change is not satisfying...</p>
  
  <p>If no, how else do I only update the source code?</p>