So, how do you guys handle configuration with microservices?

hey everyone, just wondering how you guys handle app settings in a microservices setup. we have stuff for databases, outside APIs, feature flags, you name it. are you using something like Spring Cloud Config or Consul to keep it all in one place? or do you bake it right into your container images? maybe a mix of both? what's been your experience with managing it all, keeping it secure, and getting it deployed easily