Install buildah in deploy workflow

.gitea/workflows/deploy.yaml

@@ -14,6 +14,13 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
+
+      - name: Install buildah                                                                                                                              
+        run: |
+          apt-get update && apt-get install -y buildah
+          mkdir -p /etc/containers
+          printf '[[registry]]\nlocation = "git.kimchi"\ninsecure = true\n' > /etc/containers/registries.conf
+
       - name: Checkout
         uses: actions/checkout@v4