set license info in footer

_includes/footer.html

+<footer class="site-footer h-card">
+    <div class="wrapper footer-wrapper">
+      <data class="u-url" href="{{ "/" | relative_url }}"></data>
+
+      <div class="footer-cp">
+          <div class="r3-logo-container">
+              <img class="r3-logo" src="{{ '/assets/banners/r3-logo.svg' | relative_url }}" type="image/svg+xml" />
+              <img class="lcsb-logo" src="{{ '/assets/banners/lcsb-compact.svg' | relative_url }}" type="image/svg+xml" />
+          </div>
+
+          {% comment %}This is used to generate share URL for howto-pages{% endcomment %}
+          <div class="footer-text-container">
+          {% if page.shortcut %}
+              <p>
+                  Share this page:
+                  <a href="{{ site.share_url }}{{ page.shortcut }}">
+                  {{ site.share_url }}{{ page.shortcut }}
+                  </a>
+              </p>
+
+          {% elsif page.include_link %}
+              {% assign parts = page.url | absolute_url | replace: ".html", "" | replace: "http://", "" | replace: "https://", "" | split: "/" %}
+              <p>
+                  Share this page:
+                  <a href="{{ site.share_url }}{{ parts[site.include_link_index] }}">
+                  {{ site.share_url }}{{ parts[site.include_link_index] }}
+                  </a>
+              </p>
+          {% endif %}
+              <p>
+                The contents are available under the <a href="https://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike License (CC-BY-SA 4.0)</a>.
+              </p>
+
+          {% if site.siteID > 0 %}
+              {%- include policy.html -%}
+          {% endif %}
+          </div>
+
+          <div class="social-container">
+              {%- include social.html -%}
+          </div>
+      </div>
+    </div>
+  </footer>
+  {% if site.siteID > 0 %}
+      {%- include gdpr-banner.html -%}
+  {% endif %}
\ No newline at end of file