fix(ci): publish container images to GHCR only

.github/workflows/cdn-release.yml

@@ -1,4 +1,4 @@
-name: Upload the tagged release CDN image to GHCR and Docker Hub
+name: Upload the tagged release CDN image to GHCR
 
 permissions:
   contents: read
@@ -25,12 +25,6 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Login to Docker Hub
-        uses: docker/login-action@v1
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
 
@@ -44,4 +38,4 @@ jobs:
           OWNER: "${{ github.repository_owner }}"
 
       - name: Build Docker images
-        run: docker buildx build --platform linux/amd64,linux/arm64 --push -t ghcr.io/$REPO_OWNER/$IMAGE_NAME:${{ github.event.release.tag_name }} -t ${{ secrets.DOCKERHUB_USERNAME }}/$IMAGE_NAME:${{ github.event.release.tag_name }} ./cdn
+        run: docker buildx build --platform linux/amd64,linux/arm64 --push -t ghcr.io/$REPO_OWNER/$IMAGE_NAME:${{ github.event.release.tag_name }} ./cdn