update add lib,

03_source/frontend/src/lib/firebase.ts

@@ -0,0 +1,19 @@
+import type { FirebaseApp } from 'firebase/app';
+import type { Auth as AuthType } from 'firebase/auth';
+import type { Firestore as FirestoreType } from 'firebase/firestore';
+
+import { getAuth } from 'firebase/auth';
+import { initializeApp } from 'firebase/app';
+import { getFirestore } from 'firebase/firestore';
+
+import { CONFIG } from 'src/global-config';
+
+// ----------------------------------------------------------------------
+
+const isFirebase = CONFIG.auth.method === 'firebase';
+
+export const firebaseApp = isFirebase ? initializeApp(CONFIG.firebase) : ({} as FirebaseApp);
+
+export const AUTH = isFirebase ? getAuth(firebaseApp) : ({} as AuthType);
+
+export const FIRESTORE = isFirebase ? getFirestore(firebaseApp) : ({} as FirestoreType);