I've updated the Mikhail Kozlov's workflow to generate your Statamic static site through GitHub actions.
This GitHub Workflow removes the need to generate your site locally and let GitHub handle the generation. This also saves more space in your repository since we do not need the generated site in Git.

# Simple workflow for deploying static content to GitHub Pages
name: Deploy static content to Pages

on:
  # Runs on pushes targeting the default branch
  push:
    branches: ["main"]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
permissions:
  contents: read
  pages: write
  id-token: write

# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
concurrency:
  group: "pages"
  cancel-in-progress: false

jobs:
  # Single deploy job since we're just deploying
  deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          clean: true
      - name: Setup PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: '8.4'
      - name: Install dependencies
        run: composer install --no-interaction --prefer-dist
      - name: Setup npm
        uses: actions/setup-node@v6
        with:
          node-version: '22'
      - name: Install npm dependencies
        run: | 
          npm install
          npm run build
      - name: Build static assets
        run: | 
          cp .env.example .env
          php artisan key:generate
          php please ssg:generate
        env:
          APP_ENV: production
          APP_URL: https://mathieuderuiter.nl
      - name: Setup Pages
        uses: actions/configure-pages@v5
      - name: Upload artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: 'storage/static'
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4