Ghost/core/client/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="autofocus" autocorrect="off" value=name }}
        </div>
        <div class="email-wrap">
            {{input class="email" type="email" placeholder="Email Address" name="email" autocapitalize="off" autocorrect="off" value=email }}
        </div>
        <div class="password-wrap">
            {{input class="password" type="password" placeholder="Password" name="password" value=password }}
        </div>
        <button class="button-save" type="submit" {{action "signup"}} {{bind-attr disabled=submitting}}>Sign Up</button>
    </form>
</section>