convert from connection to pools in mysql

backend/src/server.py

@@ -10,16 +10,18 @@ from flask_cors import CORS
 from dotenv import load_dotenv
 from db_client import DBClient
 from user import registerUserEndpoints
+import logging
 
 load_dotenv()
 app = Flask(__name__)
 app.config['JSON_AS_ASCII'] = False  # Ensures non-ASCII characters are preserved
+logging.basicConfig(level=logging.INFO)
 allowed_origins = [
     "https://nyipyatki.davydovcloud.com",
     "https://nyipyatki-dev.davydovcloud.com",
 ]
 CORS(app, resources={r"*": {"origins": allowed_origins}})  # Only allow example.com
-database = DBClient()
+database = DBClient(app)
 registerUserEndpoints(app=app, database=database)
 
 if __name__ == "__main__":