add github CI action

Author: Yopaman

.github/workflows/mdbook.yml

@@ -0,0 +1,57 @@
+name: Deploy mdBook site via ssh
+
+on:
+  push:
+    branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# 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:
+    runs-on: ubuntu-latest
+    env:
+      MDBOOK_VERSION: 0.4.51
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install mdBook
+        run: |
+          curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf -y | sh
+          rustup update
+          cargo install --version ${MDBOOK_VERSION} mdbook
+      - name: Build with mdBook
+        run: mdbook build
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: book
+          path: book/
+
+  # Deployment job
+  # https://zellwk.com/blog/github-actions-deploy/
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: book
+          path: book/
+      - name: Install SSH Key
+        uses: shimataro/ssh-key-action@v2
+        with:
+          key: ${{ secrets.DEPLOY_SSH_KEY }}
+          known_hosts: 'just-a-placeholder-so-we-dont-get-errors'
+      - name: Adding Known Hosts
+        run: ssh-keyscan -H ${{ secrets.DEPLOY_HOSTNAME }} >> ~/.ssh/known_hosts
+      - name: Deploy with rsync
+        run: rsync -avh --delete ./book/ ${{ secrets.DEPLOY_USER }}@${{ secrets.DEPLOY_HOSTNAME }}:/var/www/docs.alias-asso.fr/
+
+