Add Github action to publish docs to Github pages

Signed-off-by: Fabian Stäber <fabian@fstab.de>

.github/workflows/github-pages.yaml

@@ -0,0 +1,97 @@
+name: Deploy Documentation to Github Pages
+
+on:
+  # Runs on pushes targeting the 1.0.x branch
+  push:
+    branches:
+      - 1.0.x
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+# Default to bash
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    env:
+      HUGO_VERSION: 0.115.4
+    steps:
+      - name: Install OpenJDK 17
+        run: sudo apt-get -q install -y openjdk-17-jdk
+      - name: Make 17 the default java version
+        run: sudo update-alternatives --set java /usr/lib/jvm/java-17-openjdk-amd64/bin/java
+      - name: Make 17 the default javadoc version
+        run: sudo update-alternatives --set java /usr/lib/jvm/java-17-openjdk-amd64/bin/java
+      - name: Print java and javadoc versions
+        run: |
+            echo java version && \
+            java --version && \
+            echo javadoc version && \
+            javadoc --version
+      - name: Install Hugo CLI
+        run: |
+          wget -O ${{ runner.temp }}/hugo.deb https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.deb \
+          && sudo dpkg -i ${{ runner.temp }}/hugo.deb
+      - name: Install Dart Sass
+        run: sudo snap install dart-sass
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: recursive
+          fetch-depth: 0
+      - name: Build client_java
+        run: ./mvnw -B clean install -DskipTests
+      - name: Make Javadoc
+        run: ./mvnw -B compile javadoc:javadoc javadoc:aggregate
+      - name: Move the Javadoc to docs/static/api/
+        run: mv ./target/site/apidocs ./docs/static/api
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v3
+      - name: Install Node.js dependencies
+        run: "[[ -f package-lock.json || -f npm-shrinkwrap.json ]] && npm ci || true"
+        working-directory: ./docs
+      - name: Build with Hugo
+        env:
+          # For maximum backward compatibility with Hugo modules
+          HUGO_ENVIRONMENT: production
+          HUGO_ENV: production
+        run: |
+          hugo \
+            --gc \
+            --minify \
+            --baseURL "${{ steps.pages.outputs.base_url }}/"
+        working-directory: ./docs
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: ./public
+
+  # Deployment job
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2