ci(workflow): simplify Node.js installation and optimize Docker steps

Replace multi-step Node.js and npm install with single Alpine package install,
and simplify Docker builder setup by switching from GitHub Action to direct
CLI installation via apk. Also enable network debugging tools for better
troubleshooting in the CI environment.

.forgejo/workflows/build.yml

@@ -46,18 +46,9 @@ jobs:
 
     - name: Install Node.js and Sonar Scanner
       run: |
+        apk add --no-cache nodejs npm curl
         npm install -g sonarqube-scanner
 
-      - name: Install Node.js
-        run: |
-          apt-get update
-          apt-get install -y curl
-          curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
-          apt-get install -y nodejs
-
-      - name: Install Sonar Scanner (npm)
-        run: npm install -g sonarqube-scanner
-
       - name: SonarQube Scan
         env:
           SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
@@ -100,9 +91,12 @@ jobs:
   docker:
     needs: [lint, sonar]
     runs-on: self-hosted
+    container:
+      image: node:20-alpine
     steps:
       - name: Network Debugging
         run: |
+          apk add --no-cache iputils bind-tools
           cat /etc/resolv.conf
           cat /etc/hosts
           ping -c 4 server
@@ -116,7 +110,8 @@ jobs:
           git checkout FETCH_HEAD
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        run: |
+          apk add --no-cache docker-cli docker-cli-compose
 
       - name: Login to registry
         run: echo "${{ secrets.REG_TOKEN }}" | docker login "${{ secrets.REGISTRY }}" -u "${{ secrets.REG_USER }}" --password-stdin