https://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html

logback
https://springframework.guru/using-yaml-in-spring-boot-to-configure-logback/
https://springframework.guru/using-logback-spring-boot/
https://springframework.guru/logback-configuration-using-groovy/

logging:
  pattern:
    console: "%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(%5p) %clr(%property{PID}){magenta} %clr(---){faint} %clr([%15.15t]){faint}[] %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n%wex"
  level:
    cl: DEBUG

https://www.baeldung.com/spring-boot-testing-log-level