build-deploy.yml

name: Build & deploy

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  build:
    name: Build
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [12.x, 14.x, 16.x]
        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/

    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Install Node.js
        uses: actions/setup-node@v2
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'

      - name: Install NPM packages
        run: npm ci

      - name: Build project
        run: npm run build

      - name: Run tests
        run: npm run test

      - name: Upload production-ready build files
        uses: actions/upload-artifact@v2
        with:
          name: production-files-${{matrix.node-version}}
          path: ./build

  deploy:
    name: Deploy
    needs: build
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'

    steps:
      - name: Download artifact
        uses: actions/download-artifact@v2
        with:
          name: production-files-16.x
          path: ./build

      - name: Deploy to gh-pages
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./build