ci: Allow specifying hugo version

Because of
hugo: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.29' not found (required by hugo)

.forgejo/workflows/deploy.yml

@@ -0,0 +1,60 @@
+name: Deploy Hugo Site
+
+on:
+  push:
+    branches:
+      - main
+      - forge-ci
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          fetch-depth: 0
+
+      - name: Install Hugo - latest version
+        run: |
+          apt-get update -y
+          apt-get install -y wget tar jq # Install necessary components
+          ldd --version
+          
+          # If a Hugo version is provided in the secrets, use this
+          # else latest will be used
+          if [ -n "${{ secrets.HUGO_VERSION }}" ]; then
+            HUGO_VERSION="${{ secrets.HUGO_VERSION }}"
+            echo "Using Hugo version from secret: $HUGO_VERSION"
+          else
+          # Use the GitHub API to get information about the latest release, then use jq to find out the tag name
+            HUGO_VERSION=$(wget -qO- https://api.github.com/repos/gohugoio/hugo/releases/latest | jq -r '.tag_name')
+            echo "Using latest Hugo version: $HUGO_VERSION"
+          fi
+          
+          # Use ${HUGO_VERSION#v} to strip the v from v1.0.0
+          # See "Substring Removal" in https://tldp.org/LDP/abs/html/string-manipulation.html
+          wget -O hugo.tar.gz "https://github.com/gohugoio/hugo/releases/download/${HUGO_VERSION}/hugo_extended_${HUGO_VERSION#v}_Linux-64bit.tar.gz"
+          tar -xzf hugo.tar.gz hugo
+          mv hugo /usr/local/bin/hugo
+          chmod +x /usr/local/bin/hugo
+          ldd /usr/local/bin/hugo
+          hugo version
+
+      - name: Build site
+        run: hugo --minify
+
+      - name: Deploy to server via rsync
+        env:
+          DEPLOY_HOST: ${{ secrets.DEPLOY_HOST }}
+          DEPLOY_USER: ${{ secrets.DEPLOY_USER }}
+          DEPLOY_PATH: ${{ secrets.DEPLOY_PATH }}
+        run: |
+          apt-get install -y rsync openssh-client
+          mkdir -p ~/.ssh
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed25519
+          ssh-keyscan -H "$DEPLOY_HOST" >> ~/.ssh/known_hosts
+          rsync -avz --delete public/ "$DEPLOY_USER@$DEPLOY_HOST:$DEPLOY_PATH"