Add container deployment

.github/workflows/container.yml

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+name: Build blog in container
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@v3.4.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3.2.0
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3.1.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5.5.1
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Setup Hugo
+        run: |
+          LATEST_HUGO_VERSION=$(grep github.com/gohugoio/hugo go.mod | awk '{print $NF}' | sed 's/^v//')
+          HUGO_DOWNLOAD_URL="https://github.com/gohugoio/hugo/releases/download/v${LATEST_HUGO_VERSION}/hugo_extended_${LATEST_HUGO_VERSION}_linux-amd64.tar.gz"
+          curl -sL --retry 5 "$HUGO_DOWNLOAD_URL" | tar xvzf - hugo
+          ./hugo version
+
+      - name: Build with Hugo
+        env:
+          HUGO_ENVIRONMENT: production
+          HUGO_ENV: production
+        run: ./hugo --gc --minify --baseURL "${{ steps.pages.outputs.base_url }}/"
+
+      - name: Fix RSS feed
+        run: |
+          mkdir -vp public/feed
+          cp public/index.xml public/feed/index.xml
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v5.3.0
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Sign the published Docker image
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          TAGS: ${{ steps.meta.outputs.tags }}
+          DIGEST: ${{ steps.build-and-push.outputs.digest }}
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}

Dockerfile

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+FROM docker.io/library/busybox:1.36.1
+RUN adduser -D static
+USER static
+WORKDIR /home/static
+COPY ./public/ /home/static
+CMD ["busybox", "httpd", "-f", "-v", "-p", "3000"]