Use buildah

.gitea/workflows/docker.yaml

@@ -7,6 +7,13 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      - name: Build with Buildah
+        run: |
+          buildah bud -t my-image:latest .
+          buildah push my-image:latest docker://git.dswd73.duckdns.org/dswd/dyndns-updater:latest
       -
         name: Login to Docker Hub
         uses: docker/login-action@v4