take into account an optional basepath

Author: rriemann

Diff for: _includes/comments-providers/discourse.html

@@ -1,5 +1,6 @@
 {% if site.comments.discourse.server %}
-{% capture canonical %}{{ site.url }}{% if site.permalink contains '.html' %}{{ page.url }}{% else %}{{ page.url | remove:'index.html' | strip_slash }}{% endif %}{% endcapture %}
+{% include base_path %}
+{% capture canonical %}{{ base_path }}{% if site.permalink contains '.html' %}{{ page.url }}{% else %}{{ page.url | remove:'index.html' | strip_slash }}{% endif %}{% endcapture %}
 <script type="text/javascript">
     DiscourseEmbed = { discourseUrl: '//{{ site.comments.discourse.server }}/',
                        discourseEmbedUrl: '{{ canonical }}' };