feat: pack docker image

.github/workflows/docker-image.yml

@@ -0,0 +1,43 @@
+name: Build & Push Docker image
+
+on:
+  push:
+    branches:
+      - main
+
+# 写入/读取 package 权限，用于推送到 GHCR (ghcr.io)
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU (多架构构建支持)
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            ghcr.io/${{ github.repository_owner }}/moontv:latest
+            ghcr.io/${{ github.repository_owner }}/moontv:${{ github.sha }}