Node CI/CD with build and test, and GH Pages static page publish. Implements npm dependencies caching and pr/push differentiation

node_ci.yml

name: Node CI/CD

on:
  pull_request:
    branches:
      - master
  push:
    branches:
      - master

jobs:
  build:
    env:
      CI: true
    runs-on: ubuntu-latest
    steps:
    - name: Check publish secret exists
      run: |
        if [ -z "${{secrets.PERSONAL_TOKEN}}" ]
        then
          echo "PERSONAL_TOKEN secret not present"
          exit 1
        fi
    - name: Checkout
      uses: actions/checkout@v1
    - name: Use Node.js 12.x
      uses: actions/setup-node@v1
      with:
        node-version: '12.x'

    - name: Cache NPM dependencies
      uses: actions/cache@v1
      with:
        path: ~/.npm
        key: ${{ runner.OS }}-build-${{ hashFiles('**/package-lock.json') }}
        restore-keys: |
          ${{ runner.OS }}-build-${{ env.cache-name }}-
          ${{ runner.OS }}-build-
          ${{ runner.OS }}-
    - name: Install NPM dependencies
      run: npm ci

    - name: NPM Build
      run: npm run build --if-present

    - name: NPM Test
      run: npm test --if-present
      if: success()

    - name: Git GH-Pages Deploy
      if: github.event_name == 'push' && success()
      run: |
        cd $PUBLISH_DIR
        touch .nojekyll
        git init
        git config user.name github_action
        git config user.email github_action@github.com
        git config commit.gpgsign false
        git add .
        git commit -m "Automated GH-Pages Deploy by $GITHUB_ACTOR"
        git push --force --quiet https://${{secrets.PERSONAL_TOKEN}}@github.com/$GITHUB_REPOSITORY.git ${GITHUB_REF##*/}:$TARGET_BRANCH
      env:
        TARGET_BRANCH: gh-pages
        PUBLISH_DIR: dist

You need to add a PERSONAL_TOKEN to the repo secrets with (repo) permissions