PR #9 - Deploy Calendar Service as Service

* Create .Dockerfile for the Calendar Service
* Add GH Actions workflow to build and publish Docker iage

Move

.Dockerfile

@@ -0,0 +1,20 @@
+# Use an official Node runtime as a parent image
+FROM node:20-alpine3.17
+
+# Set the working directory in the container
+WORKDIR /workspace/app
+
+# Copy package.json and package-lock.json (if available)
+COPY package*.json ./
+
+# Install app dependencies
+RUN npm install
+
+# Bundle app source inside the Docker image
+COPY . .
+
+# Your app binds to port 3000 so you'll use the EXPOSE instruction to have it mapped by the docker daemon
+EXPOSE 3000
+
+# Define the command to run your app using CMD which defines your runtime
+CMD [ "node", "app.js" ]

.github/workflows/docker-image-publish.yaml

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+name: Create and publish the Docker image
+
+on:
+  push:
+    branches: ['main']
+  pull_request:
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - dockerfile: ./.Dockerfile
+            image: ghcr.io/tbd54566975/calendar-service
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ matrix.image }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: .
+          file: .Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}