Added CORS to brand.py

backend/brand.py

 from flask import Blueprint, jsonify, request
-from .database import db_connection 
-
+from flask_cors import CORS
+from .database import db_connection
 
 brand_bp = Blueprint('brand', __name__)
-    
+CORS(brand_bp)
 
 @brand_bp.route('/')
 def api_index():