init docker buildx with --push

.gitea/workflows/docker.yml

@@ -34,7 +34,9 @@ jobs:
           docker buildx use boxitapache;
           docker buildx build \
           --platform linux/arm64,linux/amd64 \
-          --tag eiche:3000/${REPOSITORY_LC}:${GITHUB_RUN_NUMBER} .
+          --tag eiche:3000/${REPOSITORY_LC}:${GITHUB_RUN_NUMBER} \
+          --push \
+          .;
           
           # Tag the same image as "latest"
           docker tag eiche:3000/${REPOSITORY_LC}:${GITHUB_RUN_NUMBER} eiche:3000/${REPOSITORY_LC}:latest