first commit of refactor

backend/firebase/admin.js

@@ -0,0 +1,20 @@
+
+
+import admin from 'firebase-admin';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+
+if (!admin.apps.length) {
+  admin.initializeApp({
+    projectId: process.env.FIREBASE_PROJECT_ID,
+    // For local development, you can use application default credentials
+    // or provide a service account key file
+  });
+}
+
+export const auth = admin.auth();
+
+export default admin;
+