try to get docker publish to work

.github/workflows/release.yml

@@ -16,6 +16,8 @@ jobs:
     runs-on: ubuntu-latest
     env:
       DOCKER_CLI_EXPERIMENTAL: "enabled"
+      DOCKER_REGISTRY: "ghcr.io"
+      DOCKER_IMAGE_NAME: "unpoller/unpoller"
     steps:
       - uses: actions/checkout@v3
         with:
@@ -23,6 +25,9 @@ jobs:
       - run: git fetch --force --tags
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v2
         with:
@@ -46,3 +51,6 @@ jobs:
           # Your GoReleaser Pro key, if you are using the 'goreleaser-pro'
           # distribution:
           GORELEASER_KEY: ${{ secrets.GORELEASER_KEY }}
+          DOCKER_REGISTRY: ${{ env.DOCKER_REGISTRY }}
+          DOCKER_IMAGE_NAME: ${{ env.DOCKER_IMAGE_NAME }}
+