try

.gitea/workflows/build-an-push.yaml

@@ -12,6 +12,8 @@ jobs:
     steps:
       - name: 'checkout'
         uses: actions/checkout@v4
+      - name: Set up Docker Context for Buildx
+        run: docker context create builders
       - name: 'setup buildx'
         uses: docker/setup-buildx-action@v3
         with: