2022
https://spring.io/blog/2022/10/12/observability-with-spring-boot-3
2020
https://www.mokkapps.de/blog/monitoring-spring-boot-application-with-micrometer-prometheus-and-grafana-using-custom-metrics/
https://blog.picnic.nl/micrometer-and-the-modern-observability-stack-ebf72283bd8e
2019
https://habr.com/ru/post/442080/
    ! with cfg sample
https://towardsdatascience.com/fundamentals-of-machine-learning-part-3-b305933f00cd