CI-Step1.yml

name: Continous Integration

on: push

jobs:
  build:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        node-version: [10.x]

    steps:
      - uses: actions/checkout@v1
      - name: Use Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v1
        with:
          node-version: ${{ matrix.node-version }}
          fetch-depth: 1
      - name: yarn install, build
        run: |
          yarn
          yarn build

CI-Step2.yml

name: Build and Deploy
on:
  push:
    branches:
      - master

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v1

      - name: Clean Install dependencies and Build
        run: |
          yarn install
          rm -rf build
          yarn build

CI-Step3.yml

name: Build and Deploy
on:
  push:
    branches:
      - master

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v1

      - name: Clean Install dependencies and Build
        run: |
          yarn install
          rm -rf build
          yarn build

      - name: Deploy
        uses: JamesIves/github-pages-deploy-action@releases/v3
        with:
          ACCESS_TOKEN: ${{ secrets.ACCESS_TOKEN }}
          BRANCH: gh-pages
          FOLDER: 'build'

      - name: Archive production artifacts
        uses: actions/upload-artifact@v1
        with:
          name: build
          path: build