Retry CI image push

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

@@ -25,7 +25,13 @@ jobs:
       - name: Build and push image
         run: |
           set -euo pipefail
-          docker buildx build --push --provenance=false --tag "$IMAGE_SHA" --tag "$IMAGE_LATEST" .
+          for attempt in 1 2 3; do
+            if docker buildx build --push --provenance=false --tag "$IMAGE_SHA" --tag "$IMAGE_LATEST" .; then
+              exit 0
+            fi
+            sleep "$((attempt * 10))"
+          done
+          exit 1
 
       - name: Skip stale deployment
         run: |