Kotlin Springboot

This covers the practical stuff you need to know when building Spring Boot apps with Kotlin instead of Java. It walks you through idiomatic dependency injection using primary constructors, setting up JPA entities with the kotlin-jpa plugin so you don't have to manually make classes open, and using data classes for DTOs and configuration properties. The testing section is solid, recommending Kotest and MockK over Java-based alternatives since they're built for Kotlin's syntax. It also covers coroutines integration, which is where Kotlin really shines in Spring Boot for async work.