add autodeploy workflow

.github/workflows/deploy.yml

@@ -0,0 +1,36 @@
+name: deploy
+
+on:
+    push:
+        branches: [main]
+
+    # Allows you to run this workflow manually from the Actions tab
+    workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+    publish:
+        runs-on: ubuntu-latest
+        steps:
+            # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+            - name: Check out repo
+              uses: actions/checkout@v2
+            # Node is required for npm
+            - name: Set up Node
+              uses: actions/setup-node@v2
+              with:
+                  node-version: "18"
+            # Install and build slidev website
+            - name: Build Slidev
+              run: |
+                  npm install
+                  npm i -g @slidev/cli
+                  slidev build --base cssworkshop2023
+            - name: Deploy to GitHub Pages
+              if: success()
+              uses: crazy-max/ghaction-github-pages@v2
+              with:
+                  target_branch: gh-pages
+                  build_dir: dist
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}