ci: Add Node.js installation step to Gitea Actions deploy workflow

.gitea/workflows/deploy.yml

@@ -12,6 +12,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
+      - name: Install Node.js (Prerequisite for Github Actions)
+        run: |
+          if ! command -v node &> /dev/null; then
+            echo "Node.js not found. Installing Node.js 20..."
+            curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
+            sudo apt-get install -y nodejs
+          fi
+
       - name: Checkout Code
         uses: actions/checkout@v4