app/views/comments/_discourse_embedded_comments.html.erb
<div id='discourse-comments'></div>
<script type="text/javascript">
DiscourseEmbed = { discourseUrl: '<%= Setting.embedded_comments_discourse_url %>',
discourseEmbedUrl: '<%= request.original_url %>' };
(function() {
var d = document.createElement('script'); d.type = 'text/javascript'; d.async = true;
d.src = DiscourseEmbed.discourseUrl + 'javascripts/embed.js';
(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(d);
})();
</script>