docs: explicitly set theme options

docs/mkdocs.yml

@@ -6,29 +6,35 @@ edit_uri: edit/docs/docs/sources/
 copyright: Copyright © 2015-2018, Alexander Zobnin
 
 docs_dir: sources
-theme: readthedocs
+
+theme:
+  name: readthedocs
+  highlightjs: true
+  hljs_languages:
+    - yaml
+    - sql
 extra_css:
   - css/custom.css
 
 pages:
-- Project:
+  - Project:
       - 'About Grafana-Zabbix': 'index.md'
       - 'Feature Highlights': 'features.md'
-- Installation:
+  - Installation:
       - 'Installation': 'installation/index.md'
       - 'Configuration': 'installation/configuration.md'
       - 'SQL Data Source Configuration': 'installation/configuration-sql.md'
       - 'Provisioning': 'installation/provisioning.md'
       - 'Upgrade': 'installation/upgrade.md'
       - 'Troubleshooting': 'installation/troubleshooting.md'
-- User Guides:
+  - User Guides:
       - 'Getting Started': 'guides/gettingstarted.md'
       - 'Templating': 'guides/templating.md'
-- Reference:
+  - Reference:
       - 'Zabbix Datasource': 'reference/datasource-zabbix.md'
       - 'Triggers Panel': 'reference/panel-triggers.md'
       - 'Functions': 'reference/functions.md'
       - 'Alerting': 'reference/alerting.md'
       - 'Direct DB Connection': 'reference/direct-db-connection.md'
-# - Tutorials:
-#     - 'Building Host Dashboard': 'tutorials/host_dashboard.md'
+  # - Tutorials:
+  #     - 'Building Host Dashboard': 'tutorials/host_dashboard.md'