Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

```
git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash
```

Closes #11925

docs/content/en/methods/site/BaseURL.md

@@ -0,0 +1,37 @@
+---
+title: BaseURL
+description: Returns the base URL as defined in the site configuration.
+categories: []
+keywords: []
+action:
+  related:
+    - functions/urls/AbsURL
+    - functions/urls/AbsLangURL
+    - functions/urls/RelURL
+    - functions/urls/RelLangURL
+  returnType: string
+  signatures: [SITE.BaseURL]
+---
+
+Site configuration:
+
+{{< code-toggle file=hugo >}}
+baseURL = 'https://example.org/docs/'
+{{< /code-toggle >}}
+
+Template:
+
+```go-html-template
+{{ .Site.BaseURL }} → https://example.org/docs/
+```
+
+{{% note %}}
+There is almost never a good reason to use this method in your templates. Its usage tends to be fragile due to misconfiguration.
+
+Use the [`absURL`], [`absLangURL`], [`relURL`], or [`relLangURL`] functions instead.
+
+[`absURL`]: /functions/urls/absURL
+[`absLangURL`]: /functions/urls/absLangURL
+[`relURL`]: /functions/urls/relURL
+[`relLangURL`]: /functions/urls/relLangURL
+{{% /note %}}