<div class="contents_main">
    <form method="POST" action="/join">
        <label>id:</label><input type="text" name="id"><br/>
        <label>pwd:</label><input type="password" name="pwd"><br/>
        <label>name:</label><input type="text" name="name"><br/>
        <button type="submit">가입</button>
    </form>
</div>