[init] initlialize next app & convert old react app

firebase-config.js

@@ -0,0 +1,16 @@
+import { getFirestore } from "@firebase/firestore";
+import { initializeApp } from "firebase/app";
+
+const firebaseConfig = {
+	apiKey: "AIzaSyDWzRRpiAd9UESS_DwhoiKKcvqPgDowQ28",
+	authDomain: "react-apartment-364115.firebaseapp.com",
+	projectId: "react-apartment-364115",
+	storageBucket: "react-apartment-364115.appspot.com",
+	messagingSenderId: "460150243441",
+	appId: "1:460150243441:web:2e19e848bbcf710a839bd0",
+	measurementId: "G-LVH2RF0ENW",
+};
+
+const app = initializeApp(firebaseConfig);
+
+export const db = getFirestore();