Ghost/ghost/admin/templates/signup.hbs

<section class="signup-box js-signup-box fade-in">
    <form id="signup" class="signup-form" method="post" novalidate="novalidate">
        <div class="name-wrap">
            <input class="name" type="text" placeholder="Full Name" name="name" autofocus autocorrect="off" />
        </div>
        <div class="email-wrap">
            <input class="email" type="email" placeholder="Email Address" name="email" autocapitalize="off" autocorrect="off" />
        </div>
        <div class="password-wrap">
            <input class="password" type="password" placeholder="Password" name="password" />
        </div>
        <button class="button-save" type="submit">Sign Up</button>
    </form>
</section>