Add deploy workflow

.github/workflows/deploy.yml

@@ -0,0 +1,34 @@
+name: Deploy
+on: [push, workflow_dispatch]
+jobs:
+  deploy:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Git checkout
+        uses: actions/checkout@v2
+
+      - name: Setup hugo
+        uses: peaceiris/actions-hugo@v2
+        with:
+          hugo-version: "0.109.0"
+          extended: true
+
+      - name: Build
+        run: hugo
+
+      - name: Install SSH deploy key
+        if: ${{ github.ref == 'refs/heads/main' }}
+        env:
+          DEPLOY_KEY: ${{ secrets.CI_DEPLOY_KEY }}
+        run: |
+          mkdir -p ~/.ssh
+          chmod 700 ~/.ssh
+          echo "$DEPLOY_KEY" > ~/.ssh/id_rsa
+          chmod 600 ~/.ssh/id_rsa
+          ssh-keyscan 107.170.116.37 > ~/.ssh/known_hosts
+
+      - name: Deploy
+        if: ${{ github.ref == 'refs/heads/main' }}
+        run: |
+          cd public
+          scp -o PubkeyAcceptedKeyTypes=+ssh-rsa -r * www-data@107.170.116.37:/var/www/davideisinger.com