build-and-deploy.yml

name: Build and Deploy
on:
  push:
    branches:
      - master
jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v1
        with:
          node-version: "14"

      - name: Installing dependencies
        run: npm ci

      - name: Build
        run: npm run build
        env:
          NEXT_PUBLIC_BASE_PATH: /build

      - name: Export
        run: npm run export
        env:
          NEXT_PUBLIC_BASE_PATH: /build

      - name: Deploy
        uses: JamesIves/github-pages-deploy-action@v4.2.3
        with:
          branch: gh-pages
          folder: build