GitHub Actions: Deployer for Node.js app to Google App Engine

google_app_engine_deployer.yml

name: Deployer

#####
# 
# Add this file to .github/workflows/google_app_engine_deployer.yml, then GitHub Actions will detect any updates on master/main branch and deploy changes. 
# This example uses Node.js 18. You can choose any language you like.
# The build command is also `npm run build', change it as you like.
# 
# 1. Set up service account for deployment and create key.json and set it to env variable
# 2. Create your app.yaml if you never deploy the app to GAE
# 3. Add this file to your app repo and push, then see if the GitHub action works fine.
# 
#####

on:
  push:
    branches: [ master, main ]
jobs:
  run-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Setup Node
        uses: actions/setup-node@v1
        with:
          node-version: 18.x

      - name: Package Install
        run: npm install

      - name: Build
        run: npm run build

      - name: Cloud Auth
        uses: google-github-actions/auth@v0
        with:
          # You need to add GCP_CREDENTIALS to your GitHub secrets:
          # cat your-service-key.json | base64 | pbcopy
          credentials_json: '${{ secrets.GCP_CREDENTIALS }}'

      - name: Set up Cloud SDK
        uses: google-github-actions/setup-gcloud@v0

      - name: Deploy App to App Engine
        run: gcloud app deploy --quiet