[ci][docker] Push multi-platform docker image

.github/workflows/docker-push.yaml

@@ -0,0 +1,38 @@
+name: Push to Docker Hub
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Extract tag name
+        id: tag_name
+        run: |
+          TAG_REF=${GITHUB_REF#refs/tags/}
+          FORMATTED_TAG=${TAG_REF#v}
+          echo "FORMATTED_TAG=${FORMATTED_TAG}" >> $GITHUB_ENV
+          echo "::set-output name=formatted_tag::${FORMATTED_TAG}"
+        shell: bash
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: docker.io
+          username: ${{ secrets.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: sagaxyz/ssc:${{ steps.tag_name.outputs.formatted_tag }}