Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -45,7 +45,7 @@ khipster --build gradle --defaults --skip-install
 CI samples:
 
 ```
-khipster generate-sample --app-sample sample-name
+khipster generate-sample
 ```
 
 Tips:
@@ -54,7 +54,13 @@ Tips:
 
 ## Synchronizing generator-jhipster templates
 
-Run:
+KHipster templates are convertions of generator-jhipster templates to kotlin.
+Templates of both projects are written in [EJS](https://ejs.co/#docs).
+
+KHipster templates are placed inside spring-boot's [templates](https://github.com/jhipster/jhipster-kotlin/tree/main/generators/spring-boot/templates) folder with an hierarchy based on generator-jhipster generators.
+KHipster intercepts generator-jhipster writing tasks [replacing java templates with kotlin templates](https://github.com/jhipster/jhipster-kotlin/blob/fa0664034dda3d406dc0d11bff82d4ae1150e838/generators/spring-boot/generator.js#L52-L89).
+
+To make easier to synchronize templates we provide a synchronize dev-blueprint which will place every copy every required template:
 
 ```sh
 khipster synchronize