title: What is Microsoft.VisualStudio.Azure.Containers.Tools.Targets package?
body: <p>When I create a project in .NET Core 2.1. These is the package <code>Microsoft.VisualStudio.Azure.Containers.Tools.Targets</code> is already included in my project. I can't find any documents for that.
  Can anyone tell me what is it?
  Thanks in advance.</p>