CICD: Add GitHub Action File for Documentation Processing.

Also add an appropriate branch condition to the actions building
docker images.

Signed-off-by: Michael Keller <[email protected]>

Author: mikeller

.github/workflows/documentation.yml

@@ -16,21 +16,16 @@ on:
 
 jobs:
   documentation:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
+    container:
+      image: ubuntu:22.04
 
     steps:
-    - name: Install Packages
-      run: |
-        sudo apt-get -y update
-        sudo apt-get -y install asciidoc docbook-xml w3m
-
-    - name: Checkout Sources
-      uses: actions/checkout@v4
-      with:
-        fetch-depth: 0
-        submodules: recursive
-
-    - name: Process the Documentation
+    - name: Process the documentation
       id: process_documentation
-      working-directory: Documentation
-      run: make
+      run: |
+        apt-get update
+        apt-get upgrade -y
+        apt-get install -y a2x
+        cd Documentation
+        make