use simple example

.github/workflows/asciidoc-ghpages.yml

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+name: asciidoctor-ghpages
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the master branch
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    - name: asciidoctor-ghpages
+      uses: manoelcampos/asciidoctor-ghpages-action@v2
+      with:
+        asciidoctor_params: --attribute=nofooter
+        pdf_build: true

asciidoc/chapter-1.adoc

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+= Chapter Title
+
+A paragraph with *bold* and _italic_ text.
+
+.Image title
+image::an-image.jpg[align=center]
+
+The `xref` macro is used for source-to-source links, like xref:a-book.adoc[].
+An external link to https://eclipse.org[Eclipse].
+
+NOTE: One of five built-in admonition block types.

asciidoc/chapter-2.adoc

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+= Another Chapter Title
+
+ Text indented by one space is preformatted.
+
+The following source code block contains a Ruby function named `hello` that prints "`Hello, World!`".
+
+[%linenums,ruby]
+----
+def hello name = 'World'
+  puts "Hello, #{name}!"
+end
+----
+
+That's all she wrote!

asciidoc/home.adoc

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+= Book Title
+Doc Writer <doc@example.org>
+v2.0.1, 2022-01-15
+:doctype: book
+:front-cover-image: cover.png[,1050,1600]
+
+[preface]
+== Preface
+
+The story behind the story.
+
+include::chapter-1.adoc[leveloffset=1]
+
+include::chapter-2.adoc[leveloffset=1]