workflow: build hugo for gh-pages

Signed-off-by: Morten Linderud <[email protected]>

Author: Foxboron

.github/workflows/gh-pages.yml

@@ -0,0 +1,35 @@
+name: GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  deploy:
+    if: github.repository == 'uapi-group/specifications'
+    runs-on: ubuntu-22.04
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+          fetch-depth: 0
+
+      - name: Setup Hugo
+        uses: peaceiris/actions-hugo@v2
+        with:
+          hugo-version: '0.104.3'
+          extended: true
+
+      - name: Build
+        run: cd website && hugo --minify -d ../public
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        if: ${{ github.ref == 'refs/heads/main' }}
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./public