sitemap.xml

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <!-- <lastmod>{{ site.time | date: '%Y-%m-%d' }}</lastmod> -->
  <lastmod>{{ post.last_modified_at | date: '%Y-%m-%d' }}</lastmod>
  {% for post in site.posts %}
    <url>
      <loc>{{ site.url }}{{ site.baseurl }}{{ post.url }}</loc>
      {% if post.lastmod == null %}
        <lastmod></lastmod>
      {% else %}
        <lastmod>{{ post.last_modified_at | date: '%Y-%m-%d' }}</lastmod>
      {% endif %}

      {% if post.sitemap.changefreq == null %}
        <changefreq>weekly</changefreq>
      {% else %}
        <changefreq></changefreq>
      {% endif %}

      {% if post.sitemap.priority == null %}
          <priority>0.5</priority>
      {% else %}
        <priority></priority>
      {% endif %}

    </url>
  {% endfor %}
</urlset>