Parameters in .NET Core docker launchSettings.json

Question

I am writing an ASP.NET Core application and I have a launchSettings.json file with the following content:

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:50251",
      "sslPort": 44349
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "AspNetDockerDemo": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "applicationUrl": "https://localhost:5001;http://localhost:5000"
    },
    "Docker": {
      "commandName": "Docker",
      "launchBrowser": true,
      "launchUrl": "{Scheme}://{ServiceHost}"
    }
  }
}

Question: Where are the { } placeholders substituded and where are the values definied by which they are substituted? What will I have to do if I want to define such values on my own?

Answer 1

This doesn't answer your question, but if you're asking because you want consistent host port numbers while debugging like I did, you can do this by adding httpPort and sslPort to the launchSettings.json file.