templates/error.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>镜花水月系统 | 登陆</title>
    <!-- Tell the browser to be responsive to screen width -->
    <meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
    <!-- Bootstrap 3.3.6 -->
    <link rel="stylesheet" href="/lib/bootstrap/css/bootstrap.min.css">
    <!-- Font Awesome -->
    <link rel="stylesheet" href="/lib/font-awesome-4.7.0/css/font-awesome.min.css">
    <!-- Theme style -->
    <link rel="stylesheet" href="/lib/adminLET2/css/AdminLTE.min.css">
    <link rel="stylesheet" href="/lib/adminLET2/css/skins/skin-red.min.css">
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    <script src="/lib/html5shiv/3.7.3/html5shiv.min.js"></script>
    <script src="/lib/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
</head>
<body>
<script type="text/javascript">
    alert("{{.message}}");
    window.history.back(-1);
</script>
</body>
</html>