title: I got some AWS CodeBuild Error. I have no clue to solve it
body: <p><em>danke schoen</em> in advance</p>
  
  <p>I'm newvie in AWS, especially I touched first AWS CodeBuild, CodeCommit... today.</p>
  
  <p>and I got this Client Error in PROVISIONING phase</p>
  
  <pre><code>Unable to pull customer's container image. ErrorCode: 404 ~~~~
  </code></pre>
  
  <p>well, I guess I've set IAM Role properly, and of course I uploaded registry with my source(it's angular2 project)</p>
  
  <p>I tried a lot of IAM role patterns (especially ec2 container service relevant roles...), and I tried building sources in AWS-based(recommaned) images and me-generated docker images(that's my goal)</p>
  
  <p>but it failed all the way.</p>
  
  <p>what do you think I did overlooked? what shoud I do?</p>