title: What is the equivalent of Web.config transform in ASP.NET Core?
body: <p>ASP.NET Core documentation suggests we should use appsettings.json file, along with a file per environment, containing overriding values. The problem is that all these files are published, though only appsettings.json and appsettings.[Environment].json are relevant. 
  The other problem is that to change a config value on server one must inspect both files: base and environment specific.</p>
  
  <p>So my question is: what is the cleanest way to have one configuration file in each deployment environment?</p>