try docker build

.gitea/workflows/ci.yml

@@ -50,9 +50,9 @@ jobs:
       - name: Log in to registry
         uses: docker/login-action@v3
         with:
-          registry: ${{ GITEA_DOMAIN }}
-          username: ${{ REGISTRY_USERNAME }}
-          password: ${{ REGISTRY_ACCESS_TOKEN }}
+          registry: ${{ vars.GITEA_DOMAIN }}
+          username: ${{ vars.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_ACCESS_TOKEN }}
 
       # - name: Build and push image
       #   uses: docker/build-push-action@v6