https://www.baeldung.com/spring-profiles#4-profile-groups
    spring.profiles.group.production=proddb,prodquartz

2023
https://www.baeldung.com/spring-profiles
    https://github.com/eugenp/tutorials/tree/master/spring-core-2
2021
https://www.baeldung.com/spring-feature-flags
https://reflectoring.io/dont-use-spring-profile-annotation/
2020
https://www.baeldung.com/spring-profiles