ci: try a key-based deploy

Author: DanySK

.github/workflows/build-and-deploy.yml

@@ -43,6 +43,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/[email protected]
+        with:
+          ssh-key: ${{ secrets.DEPLOY_KEY }}
       - name: Build Image
         run: |
           IMAGE_NAME='danysk/alchemist-sapere-tutorial'