fix: fixing Multi-platform image with GitHub Actions

.github/workflows/cd.yml

@@ -4,6 +4,11 @@ on:
   push:
     branches:
       - main
+
+env:
+  REGISTRY_IMAGE: user/app
+
+
 jobs:
   release:
     name: Create new Tag and Release
@@ -62,6 +67,12 @@ jobs:
       - name: Code Checkout
         uses: actions/checkout@v4
 
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}:${{ needs.release.outputs.new_tag_version }}
+
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
 
@@ -82,9 +93,59 @@ jobs:
           context: .
           platforms: ${{ matrix.platform }}
           file: ./Dockerfile
-          tags: |
-            flyimg/flyimg-build:latest
-            flyimg/flyimg-build:${{ needs.release.outputs.new_tag_version }}
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }}:${{ needs.release.outputs.new_tag_version }},push-by-digest=true,name-canonical=true,push=true
+      -
+        name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+      -
+        name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - docker_publish
+    steps:
+      -
+        name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}:${{ needs.release.outputs.new_tag_version }}
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY_IMAGE }}:${{ needs.release.outputs.new_tag_version }}@sha256:%s ' *)
+      -
+        name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}          
 
   deploy_demo:
     name: Deploy to Demo demo.flyimg.io