Справочник по конфигурациям в C# — 4.1. Корневые секции

"profiles": {
  "MyApp": {
    "commandName": "Project",
    "launchBrowser": true,
    "applicationUrl": "https://localhost:7200;http://localhost:5200",
    "environmentVariables": {
      "ASPNETCORE_ENVIRONMENT": "Разработка",
      "MyCustomSetting": "DebugMode"
    }
  },
  "ConsoleApp": {
    "commandName": "Project",
    "commandLineArgs": "--mode test --verbose",
    "workingDirectory": "./bin/Debug/net8.0"
  }
}