antora/supplemental-ui/partials/header-content.hbs

<header class="header">
    <nav class="navbar">
        <div class="navbar-brand">
            <div class="navbar-item">
                <a href="{{{or site.url (or siteRootUrl siteRootPath)}}}">
                    <img src="{{{uiRootPath}}}/img/sonata-flow-color-justlogo-circle-white.png" height="50px" alt="SonataFlow logo"/>
                </a>
                <a class="navbar-item" href="{{{or site.url (or siteRootUrl siteRootPath)}}}">
                    {{site.title}}
                </a>
            </div>
            {{#if env.SITE_SEARCH_PROVIDER}}
                <div class="navbar-item search hide-for-print">
                    <div id="search-field" class="field">
                        <input id="search-input" type="text" placeholder="Search docs"{{#if page.home}}
                               autofocus{{/if}}>
                    </div>
                </div>
            {{/if}}
            <button class="navbar-burger" data-target="topbar-nav">
                <span></span>
                <span></span>
                <span></span>
            </button>
        </div>
        <div id="topbar-nav" class="navbar-menu">
            <div class="navbar-end">
                <div class="navbar-item">
                    <a class="navbar-item small-item" href="https://github.com/apache"
                       target="_blank" title="Follow KIE on GitHub">
                        <div class="github-icon"></div>
                    </a>
                </div>
            </div>
        </div>
    </nav>
</header>