just use the f'ing context?

.gitea/workflows/container.yml

@@ -23,9 +23,6 @@ jobs:
           echo "${{ secrets.DOCKER_KEY }}" > /certs/client/key.pem
           echo "${{ secrets.DOCKER_CA }}" > /certs/client/ca.pem
 
-      - name: Setup Docker Builds
-        uses: docker/setup-buildx-action@v3
-
       - name: Login to Gitea registry
         uses: docker/login-action@v2
         with:
@@ -36,7 +33,6 @@ jobs:
       - name: Build and push Postfix Container
         uses: docker/build-push-action@v2
         with:
-          context: "{{defaultContext}}:postfix"
-          file: Dockerfile
+          context: postfix
           push: true
           tags: git.domainforge.de/public/postfix:latest