appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "MyKey": "My appsettings key value",
  "App": {
    "Name": "Test App",
    "Creator": "John Doe",
    "Organisation": {
      "Email": "support@test.com",
      "Phone": "1234567"
    }
  }
}