GitBucket
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>login</title>
</head>
<body>
<h1>login</h1>
<p>username</p>
<form action="/login" method="POST">
<label for="username">Username:</label>
<input type="text" id="username" name="username" required>
<input type="submit" value="ログイン">
</form>
</body>
</html>