Add GitHub workflow

.github/workflows/build.yml

@@ -0,0 +1,30 @@
+name: "Run build and deploy"
+
+on:
+  push:
+    branches: [ 'master' ]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        version: [18, 19, 20, 21]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Execute image build and push
+        run: |
+          docker build -t ghcr.io/pcvolkmer/jenkins-slave-nodejs:${{version}} ${{version}}
+          docker push ghcr.io/pcvolkmer/jenkins-slave-nodejs:${{version}}