Add Docker Release workflow

Author: vr1087

.github/workflows/docker_release.yml

@@ -0,0 +1,38 @@
+name: Docker Release
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU (for multi-arch support)
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          registry: docker.io
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          tags: |
+            docker.io/${{ secrets.DOCKERHUB_USERNAME }}/aligncount-demo:latest
+            docker.io/${{ secrets.DOCKERHUB_USERNAME }}/aligncount-demo:${{ github.ref_name }}
+          platforms: linux/amd64,linux/arm64