WIP: Add GH action to build site

.github/workflows/site.yml

@@ -0,0 +1,57 @@
+name: Build docs and deploy to GitHub Pages
+
+on:
+  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:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Pages
+        uses: actions/configure-pages@v3
+      - name: Create docs build directory
+        run: mkdir dist && chmod 777 dist
+      - name: Build generated docs # TODO Run Clay
+      - name: Build site docs # TODO
+        id: adocbuild # FIXME replace to build the site from the sources we have
+        uses: equinor/asciidoctor-action@e0ff3ce3a561ad10cced9168552ded79be257d08
+        with:
+          entry_point: index.adoc
+          docs_folder: ./cookbook
+          include_unsupported_files: true # We need .svg too
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: dist
+
+  # Deployment job
+  deploy:
+    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@v2
+