enabling linkedin preview using open graph

docs/dcc-selectbox.md

@@ -4,7 +4,6 @@
 To ensure data validity and to improve user experience, it is possible to predesignate specific values for data entry.  These appear to the user as a selectbox within the editor interface.
 
 ## Configuration
-
 Values are added by populating the `DATACTRL.MPE_SELECTBOX` table, eg below:
 
 ![selectboxtable](img/mpe_selectboxtable.png)

mkdocs.yml

@@ -36,4 +36,5 @@ theme:
     text: 'Open Sans'
     code: 'Ubuntu Mono'
   favicon: img/favicon.ico
+  custom_dir: 'theme'
 copyright: All rights reserved ©2018 Macro People Ltd.

theme/main.html

@@ -0,0 +1,10 @@
+{% extends "base.html" %}
+
+{% block extrahead %}
+
+<meta property='og:title' content='Data Controller Documentation'/>
+<meta property='og:image' content='https://datacontroller.io/wp-content/uploads/2018/04/logo-1-2.png'/>
+<meta property='og:description' content='The Data Controller for SAS® enables users to self serve their data changes, and for data owners to retain control over those updates by reviewing and approving them.'/>
+<meta property='og:url' content='https://docs.datacontroller.io/' />
+
+{% endblock %}