gnoc: install/update hugo scaffold

.gitea/workflows/publish.yml

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+# Published to fam/blog:.gitea/workflows/publish.yml by app/hugo/install.
+# Runs on the gnoc-host act_runner (host mode — job executes directly in
+# the gnoc user's shell), so we can rsync into /var/gnoc/hugo-public where
+# the gnoc-hugo nginx pod reads via hostPath.
+
+name: publish
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  build-and-publish:
+    runs-on: self-hosted
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          fetch-depth: 1
+
+      - name: Install Hugo
+        run: |
+          set -euo pipefail
+          HUGO_VERSION=0.147.6
+          TAR="hugo_extended_0.147.6_linux-amd64.tar.gz"
+          curl -fsSL -o "$RUNNER_TEMP/hugo.tar.gz" \
+            "https://github.com/gohugoio/hugo/releases/download/v0.147.6/${TAR}"
+          tar -xzf "$RUNNER_TEMP/hugo.tar.gz" -C "$RUNNER_TEMP" hugo
+          echo "$RUNNER_TEMP" >> "$GITHUB_PATH"
+
+      - name: Build
+        run: hugo --minify --gc
+
+      - name: Publish
+        run: |
+          set -euo pipefail
+          rsync -az --delete public/ /var/gnoc/hugo-public/

.gitmodules

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+[submodule "themes/PaperMod"]
+	path = themes/PaperMod
+	url = https://github.com/adityatelange/hugo-PaperMod.git

content/posts/hello.md

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+---
+title: "Hello from gnoc"
+date: 2026-04-16
+draft: false
+---
+
+这是 `gnoc-hugo` 的第一篇文章。后续文章由 agent 通过 PR 流程提交，runner 自动发布。

hugo.toml

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+baseURL = "https://famzheng.com/"
+languageCode = "zh"
+title = "gnoc"
+theme = "PaperMod"
+
+[pagination]
+  pagerSize = 10
+
+[params]
+  env = "production"
+  defaultTheme = "auto"
+  showReadingTime = true
+  showCodeCopyButtons = true