https://docs.spring.io/spring-boot/docs/current/reference/html/features.html#features.logging
https://docs.spring.io/spring-boot/docs/current/reference/html/howto-logging.html
log groups
https://docs.spring.io/spring-boot/docs/current/reference/html/features.html#features.logging.log-groups
    web
        org.springframework.core.codec,
        org.springframework.http,
        org.springframework.web,
        org.springframework.boot.actuate.endpoint.web,
        org.springframework.boot.web.servlet.ServletContextInitializerBeans
    sql
        org.springframework.jdbc.core,
        org.hibernate.SQL,
        org.jooq.tools.LoggerListener

custom log config
    https://docs.spring.io/spring-boot/docs/current/reference/html/features.html#features.logging.custom-log-configuration
        logging.config
    2020
    SpringAcademy - How to log SQL queries in Spring Boot? of 7:48
        https://www.youtube.com/watch?v=tan2UglgvME
            https://github.com/gavlyukovskiy/spring-boot-data-source-decorator
                https://github.com/jdbc-observations/datasource-proxy
                    http://jdbc-observations.github.io/datasource-proxy/docs/current/api/
                https://p6spy.readthedocs.io/en/latest/index.html
                https://buildmedia.readthedocs.org/media/pdf/p6spy/latest/p6spy.pdf
                https://www.javadoc.io/doc/p6spy/p6spy/latest/index.html

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

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

https://howtodoinjava.com/spring-boot2/logging/spring-boot-logging-configurations/

logback
https://www.baeldung.com/spring-boot-testing-log-level
https://springframework.guru/using-yaml-in-spring-boot-to-configure-logback/
    https://dzone.com/articles/using-yaml-in-spring-boot-to-configure-logback
https://springframework.guru/using-logback-spring-boot/
https://springframework.guru/logback-configuration-using-groovy/
https://www.codingame.com/playgrounds/4497/configuring-logback-with-spring-boot
    !

2022
https://www.baeldung.com/spring-boot-logging
2018
https://memorynotfound.com/spring-boot-customize-actuator-info-endpoint-example-configuration/

logging:
  file:
    path: logs
    name: my.log
  pattern:
    file: "%d %-5level [%thread] %logger : %msg%n"
    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:
    root: info

  # does not work
    - ".=info"
    - "com.memorynotfound=debug"
    - "org.springframework=info"

cmd-line options 
    --debug
    --trace
    TODO: how to specify them for gradle bootRun task?