ci: add github pages workflow for docs

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

.github/workflows/docs.yml

@@ -0,0 +1,59 @@
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - docs/**
+  workflow_dispatch:
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    # Build the site and upload artifacts using actions/upload-pages-artifact
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Build docs
+        uses: docker/bake-action@v3
+        with:
+          files: |
+            docker-bake.hcl
+          targets: docs-export
+          set: |
+            *.cache-from=type=gha,scope=docs
+            *.cache-to=type=gha,scope=docs,mode=max
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: ./build/docs
+
+  # Deploy job
+  deploy:
+    # Add a dependency to the build job
+    needs: build
+
+    # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
+    permissions:
+      pages: write      # to deploy to Pages
+      id-token: write   # to verify the deployment originates from an appropriate source
+
+    # Deploy to the github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    # Specify runner + deployment step
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2 # or the latest "vX.X.X" version tag for this action