edit .env for firebase

.env.example

@@ -1,7 +1,7 @@
 # FIREBASE
-# cert data to string
-FIREBASE_CERT = "JSON.stringify(the_file)"
-
+FIREBASE_CERT_PROJECT_ID = 
+FIREBASE_CERT_CLIENT_EMAIL = 
+FIREBASE_CERT_PRIVATE_KEY = 
 
 # DISCORD
 # discord bot token

src/wrapper/firebase.ts

@@ -4,7 +4,11 @@ import { config } from "dotenv";
 config();
 
 initializeApp({
-  credential: cert(JSON.parse(process.env.FIREBASE_CERT as string)),
+  credential: cert({
+    projectId: process.env.FIREBASE_CERT_PROJECT_ID,
+    clientEmail: process.env.FIREBASE_CERT_CLIENT_EMAIL,
+    privateKey: process.env.FIREBASE_CERT_PRIVATE_KEY?.replace(/\\n/g, "\n"),
+  }),
 });
 
 const db = getFirestore();