static file like .css and .js not load error 404

[adventuretocode]

express js version : "express": "^4.18.2",

app.use(Express.static('public'));

express folder with app.js server code same dir i have public folder.

public/

• app.js
• app.css

when i try to access https://mystoreapp.io/app.js https://mystoreapp.io/app.css

getting Error 404

HTTP ERROR 404 ```