Docs: mention docsify on "Build customization" (#9439)

* Docs: mention `docsify` on "Build customization"

Initial minimal mention to `docsify` as an example in our "Build customization"
section.

Related #9435

* Apply suggestions from code review

Co-authored-by: Anthony <aj@ohess.org>

* Make target names unique

Co-authored-by: Anthony <aj@ohess.org>

docs/user/build-customization.rst

@@ -76,8 +76,8 @@ There are some caveats to knowing when using user-defined jobs:
 * ``build.os`` and ``build.tools`` are required when using ``build.jobs``
 
 
-Examples
-++++++++
+``build.jobs`` examples
++++++++++++++++++++++++
 
 We've included some common examples where using :ref:`config-file/v2:build.jobs` will be useful.
 These examples may require some adaptation for each projects' use case,
@@ -256,8 +256,23 @@ If your project requires full control of the build process,
 and :ref:`extending the build process <build-customization:extend the build process>` is not enough,
 all the commands executed during builds can be overridden using the :ref:`config-file/v2:build.commands` configuration file key.
 
-For example, if your project uses `Pelican <https://blog.getpelican.com/>`_ instead of Sphinx for its documentation,
-your project could use the following configuration file:
+As Read the Docs does not have control over the build process,
+you are responsible for running all the commands required to install requirements and build your project properly.
+Once the build process finishes, the contents of the ``_readthedocs/html/`` directory will be hosted.
+
+
+``build.commands`` examples
++++++++++++++++++++++++++++
+
+This section contains some examples that showcase what is possible with :ref:`config-file/v2:build.commands`.
+Note that you may need to modify and adapt these examples depending on your needs.
+
+
+Pelican
+~~~~~~~
+
+`Pelican <https://blog.getpelican.com/>`__ is a well-known static site generator that's commonly used for blogs and landing pages.
+If you are building your project with Pelican you could use a configuration file similar to the following:
 
 .. code-block:: yaml
    :caption: .readthedocs.yaml
@@ -272,9 +287,24 @@ your project could use the following configuration file:
        - pelican --settings docs/pelicanconf.py --output _readthedocs/html/ docs/
 
 
-As Read the Docs does not have control over the build process,
-you are responsible for running all the commands required to install requirements and build the documentation properly.
-Once the build process finishes, the ``_readthedocs/html/`` folder will be hosted.
+Docsify
+~~~~~~~
+
+`Docsify <https://docsify.js.org/>`__ generates documentation websites on the fly, without the need to build static HTML.
+These projects can be built using a configuration file like this:
+
+.. code-block:: yaml
+   :caption: .readthedocs.yaml
+
+   version: 2
+   build:
+     os: "ubuntu-22.04"
+     tools:
+       nodejs: "16"
+     commands:
+       - mkdir --parents _readthedocs/html/
+       - cp --recursive docs/* _readthedocs/html/
+
 
 Search support
 ++++++++++++++