OZG-4939 Added Configuration of resource server

src/main/java/de/ozgcloud/admin/security/SecurityConfiguration.java

@@ -26,6 +26,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
+import org.springframework.security.config.Customizer;
 import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
@@ -41,6 +42,8 @@ public class SecurityConfiguration {
 	SecurityFilterChain filterChain(HttpSecurity http, ServerProperties serverProperties, @Value("${permit-all:[]}") String[] permitAll)
 			throws Exception {
 
+		// Configure a resource server with JWT decoder
+		http.oauth2ResourceServer(oauth2 -> oauth2.jwt(Customizer.withDefaults()));
 		// State-less session (state in access-token only)
 		http.sessionManagement(sm -> sm.sessionCreationPolicy(SessionCreationPolicy.STATELESS));