Docs: add ci workflow for building Sealos Docs Site Docker image

.github/workflows/docs-site-image.yml

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+name: Build and push Sealos Docs Site Docker image
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main"]
+    paths:
+      - "docs/**"
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            ${{ secrets.DOCKER_USERNAME }}/sealos-site
+            ghcr.io/${{ github.repository_owner }}/sealos-site
+            registry.cn-hangzhou.aliyuncs.com/labring4docker/sealos-site
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Login to ghcr.io
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GH_PAT }}
+
+      - name: Login to Aliyun Hub
+        uses: docker/login-action@v3
+        with:
+          registry: registry.cn-hangzhou.aliyuncs.com
+          username: ${{ secrets.ALI_HUB_USERNAME }}
+          password: ${{ secrets.ALI_HUB_PASSWORD }}
+
+      - name: Build and push Docker images to ghcr.io and Aliyun Hub
+        uses: docker/build-push-action@v5
+        with:
+          context: ./docs
+          file: ./docs/website/Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

docs/website/Dockerfile

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+FROM node:20.4 AS builder
+
+WORKDIR /app
+
+COPY . /app
+
+RUN mkdir website/i18n/zh-Hans/docusaurus-plugin-content-docs/; \
+    cp -r 4.0/i18n/zh-Hans/ website/i18n/zh-Hans/docusaurus-plugin-content-docs/current/; \
+    cp 4.0/i18n/zh-Hans/current.json  website/i18n/zh-Hans/docusaurus-plugin-content-docs/current.json; \
+    cp 4.0/code.json  website/i18n/zh-Hans/code.json
+
+WORKDIR /app/website
+
+RUN yarn install
+
+RUN yarn run build
+
+FROM fholzer/nginx-brotli:latest
+
+COPY --from=builder /app/website/build /usr/share/nginx/html