fedi-classifieds/_includes/header.njk

<header>
    <nav>
    {% if page.url == "/submit/" %}
      <a href="/">Return Home</a>
    {% elif page.url == "/" %}
      <a href="/submit/">Submit Your Own</a>
    {% endif %}
    </nav>

  <div class="wip">
    <p>This site is still a bit of a proof-of-concept. I don't know yet if it'll
    go anywhere! Feel free to sign up regardless and I'll put ya in. (Note: all
    handles that are @test.test are, I hope obviously, fake data.)</p>
  </div>
</header>