add contents for mdbook

Signed-off-by: Alex Chi <iskyzh@gmail.com>

.github/workflows/main.yml

@@ -0,0 +1,37 @@
+name: CI (Pull Request)
+
+on:
+  push:
+    branches:
+      - main
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+      - uses: taiki-e/install-action@nextest
+      - uses: taiki-e/install-action@mdbook
+      - name: check and build
+        run: cargo x ci
+      - uses: actions/upload-pages-artifact@v1
+        with:
+          path: mini-lsm-book/book
+
+  deploy:
+    needs: build
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1