Add docs workflow

Author: lucic71

.github/workflows/docs.yml

@@ -0,0 +1,44 @@
+name: Deploy docs
+
+on:
+  push:
+    branches: [master, docs]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      MDBOOK_VERSION: 0.5.4
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install mdbook
+        run: |
+          mkdir -p "$HOME/.local/bin"
+          curl -sSL "https://github.com/rust-lang/mdBook/releases/download/v${MDBOOK_VERSION}/mdbook-v${MDBOOK_VERSION}-x86_64-unknown-linux-gnu.tar.gz" \
+            | tar -xz -C "$HOME/.local/bin"
+          echo "$HOME/.local/bin" >> "$GITHUB_PATH"
+      - name: Build book
+        run: mdbook build docs
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs/book
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v4