A microservice architecture allows systems to grow organically by adding features as needed. A common structure for these services includes boilerplate code, which can be simplified using Go frameworks such as logrus, cobra, and viper. The author provides an example of building a simple service using these libraries, including configuration, commands, and logging. The service uses a config file, command-line args, and environment variables to store its configuration, with the ability to use a custom configuration file. The author also discusses unmarshaling a config struct and adding logging capabilities, including nested config values and hooks for custom formatters.