aspnetcore/samples/SampleApp/appsettings.Development.json

{
  "Kestrel": {
    "Endpoints": {
      "NamedEndpoint": { "Url": "http://localhost:6000" },
      "NamedHttpsEndpoint": {
        "Url": "https://localhost:6443",
        "Certificate": {
          "Subject": "localhost",
          "Store": "My",
          "AllowInvalid": true
        }
      }
    }
  }
}