Update GitHub Actions workflow for mdBook deployment

Author: FedericoBruzzone

.github/workflows/deploy-docs.yml

@@ -0,0 +1,39 @@
+name: Deploy mdBook to Pages
+
+on:
+  push:
+    branches: ["main"]
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install mdBook
+        run: |
+          curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.37/mdbook-v0.4.37-x86_64-unknown-linux-gnu.tar.gz | tar -xz
+          sudo mv mdbook /usr/local/bin/
+
+      - name: Build with mdBook
+        run: |
+          cd docs/eter
+          mdbook build
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: 'docs/eter/book'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4