title: YAML_FILE_ERROR Message: Wrong number of container tags, expected 1
body: <p>I am new to AWS CodePipeline and I am getting this Error on AWS CodeBuild</p>
  
  <p>"YAML_FILE_ERROR Message: Wrong number of container tags, expected 1"</p>
  
  <p>I have setup AWS CodePipeline with CodeBuild and CloudFormation for aspnet core 2.1 project. Here is my buildspec.yml</p>
  
  <pre><code> {
    "name": "Utility",
    "source": {
      "type": "S3",
       "location": "&lt;location&gt;/windows-dotnetcore.zip"
   },
      "artifacts": {
      "type": "S3",
      "location": "&lt;location&gt;",
      "packaging": "ZIP",
      "name": "Utility.zip"
    },
    "environment": {
    "type": "LINUX_CONTAINER",
    "image": "aws/codebuild/dot-net:core-2.1",
    "computeType": "BUILD_GENERAL1_SMALL"
   },
   "serviceRole": "&lt;value&gt;",
   "encryptionKey": "&lt;value&gt;"
   }
  </code></pre>