✨ Add `keywords` front matter support

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Added
 
+- Front matter keywords support on a per article basis
 - Indonesian translation ([#398](https://github.com/jpanther/congo/pull/398))
 - Mastodon sharing links ([#405](https://github.com/jpanther/congo/pull/405))
 - `homepage.recentLimit` parameter to adjust the maximum number of recent items listed on the homepage ([#411](https://github.com/jpanther/congo/pull/411))

exampleSite/content/docs/front-matter.md

@@ -20,6 +20,7 @@ Front matter parameter default values are inherited from the theme's [base confi
 |`editURL`|`article.editURL`|When `showEdit` is active, the URL for the edit link.|
 |`editAppendPath`|`article.editAppendPath`|When `showEdit` is active, whether or not the path to the current article should be appended to the URL set at `editURL`.|
 |`groupByYear`|`list.groupByYear`|Whether or not articles are grouped by year on list pages.|
+|`keywords`|_Not set_|Any keywords that should be included in the article metadata.|
 |`menu`|_Not set_|When a value is provided, a link to this article will appear in the named menus. Valid values are `main` or `footer`.|
 |`robots`|_Not set_|String that indicates how robots should handle this article. If set, it will be output in the page head. Refer to [Google's docs](https://developers.google.com/search/docs/advanced/robots/robots_meta_tag#directives) for valid values.|
 |`sharingLinks`|`article.sharingLinks`|Which sharing links to display at the end of this article. When not provided, or set to `false` no links will be displayed.|

layouts/partials/head.html

@@ -16,8 +16,8 @@
   {{- end }}
   {{/* Metadata */}}
   <meta name="description" content="{{ with .Description }}{{ . }}{{ else }}{{ if .IsPage }}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}" />
-  {{ with .Site.Params.keywords -}}
-    <meta name="keywords" content="{{ . }}" />
+  {{ with union .Site.Params.keywords .Params.keywords -}}
+    <meta name="keywords" content="{{ delimit . `, `}}" />
   {{- end }}
   {{ with .Site.Params.robots }}
     <meta name="robots" content="{{ . }}" />