ReadingGarden Kotlin Migration Backend

Legacy Migration

Reimplemented Django-based APIs in Kotlin/Spring Boot while preserving the existing app contract

Domain Modularization

Split package structure into auth, book, garden, memo, push, scheduler, and app domains

API Compatibility

Verified compatibility for legacy response envelopes, snake_case fields, JWT authentication flow, and image upload/retrieval paths

DB Migration

Managed schema changes with PostgreSQL + Flyway and secured production schema stability with Hibernate validate

Deployment Automation

Built OCI A1 deployment with GitHub Actions and Docker images, including blue-green deployment through Caddy upstream switching

Operational Observability

Configured Actuator/Prometheus metrics, Grafana dashboards, Loki log collection, and health/docs/smoke check based operations

Test Strategy

Verified the full Controller-Service-Repository flow with Testcontainers PostgreSQL integration tests and legacy contract fixtures