ci: add docker publish workflow

.github/workflows/docker_publish.yaml

@@ -0,0 +1,77 @@
+name: Publish Docker Image
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Docker image tag (e.g., latest, v0.1.0)"
+        required: false
+        default: "latest"
+
+permissions:
+  contents: read
+  packages: write
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-image:
+    name: Build Docker image (${{ matrix.arch }})
+    strategy:
+      matrix:
+        include:
+          - runner: ubuntu-latest
+            arch: amd64
+          - runner: ubuntu-22.04-arm
+            arch: arm64
+    runs-on: ${{ matrix.runner }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ inputs.tag }}-${{ matrix.arch }}
+          platforms: linux/${{ matrix.arch }}
+          cache-from: type=gha,scope=${{ matrix.arch }}
+          cache-to: type=gha,scope=${{ matrix.arch }},mode=max
+
+  publish-manifest:
+    name: Create and push multi-arch manifest
+    runs-on: ubuntu-latest
+    needs: build-image
+
+    steps:
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create multi-arch manifest
+        env:
+          SHORT_SHA: ${{ github.sha }}
+        run: |
+          docker buildx imagetools create \
+            -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ inputs.tag }} \
+            -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:sha-${SHORT_SHA::7} \
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ inputs.tag }}-amd64 \
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ inputs.tag }}-arm64