Configure keycloak (#4)

Co-authored-by: Phan Huy Tran <p.tran@neusta.de>
Reviewed-on: #4
Co-authored-by: ptran <huydw@proton.me>
Co-committed-by: ptran <huydw@proton.me>

package.json

@@ -20,6 +20,7 @@
     "@angular/platform-browser": "^19.0.4",
     "@angular/platform-browser-dynamic": "^19.0.4",
     "@angular/router": "^19.0.4",
+    "keycloak-angular": "^16.1.0",
     "rxjs": "~7.8.1",
     "tailwind": "4.0.0",
     "tslib": "^2.8.1",
@@ -38,4 +39,4 @@
     "karma-jasmine-html-reporter": "~2.1.0",
     "typescript": "~5.5.4"
   }
-}
+}