Data not showing but everything working fine, also no errors are there

my app works fine you can see https://mern-hotel-frontend.onrender.com/ but theres no data showing, i am not using any env file in project but my project runs fine locally, login page is also showing error as it gives access to any user, what should i do, is my mongodb not connected?? i am using mern here is the git link GitHub - Japjeet07/Hotelbooking and the db.js backend file

Hey there, I’m seeing data on your page. Images of rooms.