Adding siteinfo.html

Some basic debugging info

siteinfo.md

@@ -0,0 +1,19 @@
+---
+title: "Testing Jekyll environment"
+sidebar: mydoc_sidebar
+permalink: siteinfo.html
+---
+
+## Site
+
+- site.port: {{site.port}}
+- site.host: {{site.host}}
+- site.url: {{site.url}}
+- site.baseurl: {{site.baseurl}}
+
+{% comment %}
+## Full dump
+
+<pre>{{site|inspect}}</pre>
+
+{% endcomment %}