zhenyi
7b8d0714e7
- Add etcd-client dependency with TLS support - Implement EtcdConfig struct for reading config values with priority: etcd > env > default - Add ServiceRegistry for service discovery registration in etcd - Create from_etcd method in AppConfig for loading SMTP configuration - Update main.rs to use etcd-based config loading with fallback mechanism - Add etcd module with client connection and key-value operations - Modify Dockerfile to use cargo-chef for faster builds - Add docker-compose.yaml for emailks service deployment - Include AGENTS.md with development guidelines and best practices - Add build.sh script for podman-based container building - Update dependencies in Cargo.toml and Cargo.lock