so that we can ship reasonable default with the new MP approach within webapps, while MP allows customers to override config easily from external sources.

• WEB-INF should be able to override META-INF from modules (100)
• external files via smallrye.config.locations should override WEB-INF (at least)
  • external locations sources use the same ordinal of the source that found the smallrye.config.locations configuration property. For instance, if smallrye.config.locations is set as a system property, then all loaded sources have their ordinals set to 400 (system properties use 400 as their ordinal).
    https://smallrye.io/smallrye-config/3.5.4/config-sources/locations/

by default SmallRye looks into jar files under META-INF/microprofile-config.properties
see smallrye docs for how to add configuration sources
smallrye.io/smallrye-config/Main/config/getting-started/