📝 Better explain `robots.txt` generation

Ref #179

exampleSite/content/docs/configuration.md

@@ -33,7 +33,7 @@ Note that the variable names provided in this table use dot notation to simplify
 |`theme`|`"congo"`|When using Hugo Modules this config value should be removed. For all other installation types, this must be set to `congo` for the theme to function.|
 |`baseURL`|_Not set_|The URL to the root of the website.|
 |`defaultContentLanguage`|`"en"`|This value determines the default language of theme components and content. Refer to the [language and i18n](#language-and-i18n) section below for supported language codes.|
-|`enableRobotsTXT`|`true`|When enabled a `robots.txt` file will be created in the site root that allows search engines to crawl the entire site. Set to `false` if you wish to provide your own file.|
+|`enableRobotsTXT`|`true`|When enabled, a `robots.txt` file will be created in the site root that allows search engines to crawl the entire site. If you prefer to provide your own pre-made `robots.txt`, set to `false` and place your file in the `static` directory. For complete control, you may provide a [custom layout]({{< ref "content-examples#custom-layouts" >}}) to generate this file.|
 |`paginate`|`10`|The number of articles listed on each page of the article listing.|
 |`summaryLength`|`0`|The number of words that are used to generate the article summary when one is not provided in the [front matter]({{< ref "front-matter" >}}). A value of `0` will use the first sentence. This value has no effect when summaries are hidden.|
 |`outputs.home`|`["HTML", "RSS", "JSON"]`|The output formats that are generated for the site. Congo requires HTML, RSS and JSON for all theme components to work correctly.|