build: add Dockerfile

.dockerignore

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+node_modules

.github/workflows/docker-image.yml

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+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "master" ]
+  # pull_request:
+  #   branches: [ "master" ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: docker.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      # This is used to complete the identity challenge
+      # with sigstore/fulcio when running outside of PRs.
+      id-token: write
+
+    # https://docs.docker.com/build/ci/github-actions/export-docker/
+    # https://docs.docker.com/build/ci/github-actions/test-before-push/
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      # Install the cosign tool except on PR
+      # https://github.com/sigstore/cosign-installer
+      -
+        name: Install Cosign
+        uses: sigstore/[email protected]
+        with:
+          cosign-release: 'v2.1.1'
+      -
+        name: Check cosign install
+        run: cosign version
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      -
+        name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      -
+        name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+      # Sign the resulting Docker image digest except on PRs.
+      # This will only write to the public Rekor transparency log when the Docker
+      # repository is public to avoid leaking data.  If you would like to publish
+      # transparency data even for private images, pass --force to cosign below.
+      # https://github.com/sigstore/cosign
+      - 
+        name: Sign the published Docker image
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          COSIGN_EXPERIMENTAL: "true"
+        # This step uses the identity token to provision an ephemeral certificate
+        # against the sigstore community Fulcio instance.
+        run: echo "${{ steps.meta.outputs.tags }}" | xargs -I {} cosign sign --yes {}@${{ steps.build-and-push.outputs.digest }}

Dockerfile

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+FROM node:20.5-alpine3.18
+ENV NODE_ENV=production
+
+COPY ["package.json", "package-lock.json*", "./"]
+
+RUN npm install --production
+
+COPY . .
+
+RUN echo "PORT=5001\nKEY=XXXtestXXX" >> .env
+
+CMD [ "npm", "run", "start" ]
+
+EXPOSE 5001