Convert docdock theme from submodule to native files and fix Hugo compatibility

themes/docdock/exampleSite/content/shortcodes/excerpt.md

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+title = "excerpt"
+description = "The Excerpt shortcode is used to mark a part of a page's content for re-use."
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+
+The Excerpt shortcode is used to mark a part of a page's content for re-use. Defining an excerpt enables other shortcodes, such as the excerpt-include shortcode, to display the marked content elsewhere.
+
+{{%alert warning%}}You can only define one excerpt per page. In other words, you can only add the Excerpt shortcode once to a page.{{%/alert%}}
+
+
+## Usage
+
+| Parameter | Default | Description |
+|:--|:--|:--|
+| hidden | "false" | Controls whether the page content contained in the Excerpt shortcode placeholder is displayed on the page.{{%alert warning%}}Note that this option affects only the page that contains the Excerpt shortcode. It does not affect any pages where the content is reused.{{%/alert%}} |
+
+## Demo
+
+	{{%/*excerpt*/%}}
+	Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
+	tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
+	quis nostrud exercitation **ullamco** laboris nisi ut aliquip ex ea commodo
+	consequat. Duis aute irure dolor in _reprehenderit in voluptate_
+	cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
+	proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+	{{%/* /excerpt*/%}}
+
+{{%excerpt%}}
+Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
+tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
+quis nostrud exercitation **ullamco** laboris nisi ut aliquip ex ea commodo
+consequat. Duis aute irure dolor in _reprehenderit in voluptate_
+cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
+proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+{{% /excerpt%}}
+
+
+
+{{%alert info%}}See re use example with [excerpt-include shortcode]({{%relref "shortcodes/excerpt-include.md"%}}){{%/alert%}}