Team 10 ase 39 rbac for endpoints

[LucaSchmitz2003]

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[Copilot]

Pull Request Overview

This PR adds OAuth2 JWT authentication with Keycloak integration to the Spring Boot user service. The changes implement role-based access control using JWT tokens from a Keycloak realm.

• Configures OAuth2 resource server with JWT authentication using Keycloak
• Implements custom JWT authentication converter for role extraction and mapping
• Adds role-based endpoint protection with a demo controller for testing

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/main/resources/application.yaml	Adds OAuth2 JWT configuration with Keycloak issuer and JWK set URIs, sets server port
src/main/java/com/ase/userservice/security/SecurityConfig.java	Configures security filter chain with role-based authorization and JWT authentication
src/main/java/com/ase/userservice/security/JwtAuthConverter.java	Custom converter to extract roles from JWT claims and map them to Spring Security authorities
src/main/java/com/ase/userservice/controllers/DemoController.java	Simple demo controller with role-protected endpoint for testing authentication
pom.xml	Adds Spring Security and OAuth2 resource server dependencies
Dockerfile	Configures Docker container for running the Spring Boot application

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