Update src/db.js

src/db.js

@@ -1,12 +1,13 @@
 const admin = require('firebase-admin');
 const MiniSearch = require('minisearch');
-require('dotenv').config();
+// require('dotenv').config();
 
 // 1. Initialize Firestore
 if (!admin.apps.length) {
-  admin.initializeApp({
-    credential: admin.credential.applicationDefault()
-  });
+  
+    const svc = JSON.parse(FIREBASE_CREDENTIALS);
+    admin.initializeApp({ credential: admin.credential.cert(svc) });
+      
 }
 const db = admin.firestore();
 const TOOLS_COLLECTION = 'mcp_tools';