ADD: dockerfile and pipeline

.github/workflows/docker-image.yml

@@ -0,0 +1,32 @@
+name: Docker Image CI
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      -main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+    - name: Log in to Github Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{github.repository_owner}}
+        password: ${{secrets.GITHUB_TOKEN}}
+    - name: Build and push Dock image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        push: true
+        tags: |
+          ghcr.io/${{github.repository_owner}}/getting-started: latest
+          ghcr.io/${{github.repository_owner}}/getting-started: ${{github.sha}}

Dockerfile

@@ -0,0 +1,7 @@
+FROM node:18-alpine
+WORKDIR /app
+COPY . .
+RUN yarn install --production && yarn cache clean
+ENTRYPOINT ["node"]
+CMD ["src/index.js"]
+EXPOSE 3000