Hi I'm a super beginner. I created my single page flask website (3.6) and then created a main.css file in the same directory as flask_app.py. I then put the following code for css but its not loading. dont know what am I doing wrong here
return '''
<html>
<head>
<title>My website</title>
<link rel="stylesheet" href="main.css">
</head>
<body>
<header>
<div class="container">