Refactor GitHub Actions workflow to build Docker image and run man page generation in container

Signed-off-by: Stephen Simpson <ssimpson89@users.noreply.github.com>

.github/workflows/build.yml

@@ -25,39 +25,26 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container:
-      image: rockylinux:9
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Install system dependencies
+      - name: Build Docker image
         run: |
-          dnf install -y \
-            python3.11 \
-            python3.11-pip \
-            mandoc \
-            rpm-build \
-            dnf-plugins-core \
-            git
+          docker build -t rocky-man:latest .
 
-      - name: Install UV
+      - name: Create output directories
         run: |
-          curl -LsSf https://astral.sh/uv/install.sh | sh
-          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
+          mkdir -p ./html ./tmp
 
-      - name: Install Python dependencies
+      - name: Build man pages in container
         run: |
-          uv pip install --system -e .
-
-      - name: Build man pages
-        run: |
-          python3.11 -m rocky_man.main \
-            --versions ${{ github.event.inputs.versions || '8.10 9.5' }} \
-            --output-dir ./html \
-            --download-dir ./tmp/downloads \
-            --extract-dir ./tmp/extracts \
+          docker run --rm \
+            -v "$(pwd)/html:/data/html" \
+            -v "$(pwd)/tmp:/data/tmp" \
+            rocky-man:latest \
+            --versions ${{ github.event.inputs.versions || '8.10 9.6 10.0' }} \
             --verbose
         env:
           PYTHONUNBUFFERED: 1