added instructions for publishing with github pages. also added more detail on install page and in config file -- just documentation

_data/sidebars/mydoc_sidebar.yml

@@ -30,7 +30,7 @@ entries:
     - title: 5.0 Release notes
       url: /mydoc_release_notes_50/
       output: web, pdf
-      
+
     - title: Introduction
       url: /mydoc_introduction/
       output: web, pdf
@@ -187,6 +187,10 @@ entries:
       url: /mydoc_no_password_prompts_scp/
       output: web, pdf
 
+    - title: Publishing on Github Pages
+      url: /mydoc_publishing_github_pages/
+      output: web, pdf
+
   - title: Special layouts
     output: web, pdf