Add note about baseurl in Pages

doc/user/project/pages/getting_started_part_one.md

@@ -80,6 +80,9 @@ To understand Pages domains clearly, read the examples below.
 
 ## URLs and baseurls
 
+NOTE: **Note:**
+The `baseurl` option might be called named differently in some static site generators.
+
 Every Static Site Generator (SSG) default configuration expects
 to find your website under a (sub)domain (`example.com`), not
 in a subdirectory of that domain (`example.com/subdir`). Therefore,
@@ -96,7 +99,7 @@ baseurl: "/blog"
 ```
 
 On the contrary, if you deploy your website after forking one of
-our [default examples](https://gitlab.com/pages), the baseurl will
+our [default examples](https://gitlab.com/pages), the `baseurl` will
 already be configured this way, as all examples there are project
 websites. If you decide to make yours a user or group website, you'll
 have to remove this configuration from your project. For the Jekyll
@@ -106,6 +109,9 @@ example we've just mentioned, you'd have to change Jekyll's `_config.yml` to:
 baseurl: ""
 ```
 
+If you're using the [plain HTML example](https://gitlab.com/pages/plain-html),
+you don't need to set a `baseurl`.
+
 ## Custom domains
 
 GitLab Pages supports custom domains and subdomains, served under HTTP or HTTPS.