add deploy script

.github/workflows/build.yml

@@ -0,0 +1,65 @@
+
+name: Build & Deploy
+
+on:
+  push:
+    branches: ["gh_pages"]
+  pull_request:
+    branches: ["gh_pages"]
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 20 #fetch the last 20 commits to get mtimes from
+          lfs: true
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          cache-version: 0 # Increment this number if you need to re-download cached gems
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v3
+      - name: restore files mtime
+        run: |
+          sudo apt -qqy update
+          sudo apt -qqy install git-restore-mtime
+          git restore-mtime
+      - name: Build with Jekyll
+        run: bundle exec jekyll build --baseurl "${{ steps.pages.outputs.base_path }}"
+        env:
+          JEKYLL_ENV: production
+      - name: test HTML validity
+        run: bundle exec htmlproofer _site/ --disable-external true --enforce-https false --log-level :debug
+      - name: Upload artifact
+        if: ${{ github.ref == 'refs/heads/main' }}
+        uses: actions/upload-pages-artifact@v1
+
+  # Deployment job
+  deploy:
+    if: ${{ github.ref == 'refs/heads/main' }}
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1