feat: initial release of pengzhan.dev personal editorial blog platform

- Editorial web platform built with Node.js, Express, EJS, and Vanilla CSS
- Markdown content engine with YAML frontmatter, bilingual variants, and hot-reload watcher
- Unified SQLite with FTS5 search indexing, query logging, and schema filters
- Centered editorial post layout with margin-docked left TOC and mobile bottom sheet
- WordPress-grade comment system with moderation dashboard and bulk operations under /guanli
- Complete SEO suite (JSON-LD structured data, RSS/Atom feeds, XML sitemap, robots.txt)
- CI/CD workflows for linting, security audits (Gitleaks), automated tests, and Docker releases

server/config.js

@@ -0,0 +1,64 @@
+const fs = require('fs');
+const path = require('path');
+const yaml = require('js-yaml');
+
+// Content directory: prioritize ENV var, then /app/content (in K8s), fallback to ./sample-content
+function resolveContentDir() {
+  if (process.env.CONTENT_DIR && fs.existsSync(process.env.CONTENT_DIR)) {
+    return path.resolve(process.env.CONTENT_DIR);
+  }
+  if (fs.existsSync('/app/content')) {
+    return '/app/content';
+  }
+  return path.resolve(__dirname, '../sample-content');
+}
+
+const CONTENT_DIR = resolveContentDir();
+
+function loadSiteConfig() {
+  const configPath = path.join(CONTENT_DIR, 'config.yaml');
+  const defaults = {
+    site: {
+      title: "Pengzhan",
+      tagline: "Was childish, Now foolish",
+      url: "https://pengzhan.dev",
+      author: {
+        name: "Pengzhan Hao",
+        subtitle: "Software engineer on Cloud",
+        gravatar: ""
+      }
+    },
+    navigation: [
+      { label: "Home", path: "/" },
+      { label: "Blogs", path: "/blogs" },
+      { label: "Search", path: "/search" },
+      { label: "Quick Links", path: "/quick-links" }
+    ],
+    social: [
+      { platform: "github", url: "https://github.com/CoderSherlock" },
+      { platform: "instagram", url: "https://www.instagram.com/pengzhan.hao/" },
+      { platform: "linkedin", url: "https://www.linkedin.com/in/pengzhanhao/" },
+      { platform: "email", address: "[email protected]" }
+    ],
+    search: {
+      recommended: []
+    },
+    plugins: {}
+  };
+
+  if (fs.existsSync(configPath)) {
+    try {
+      const fileContent = fs.readFileSync(configPath, 'utf8');
+      const parsed = yaml.load(fileContent);
+      return { ...defaults, ...parsed };
+    } catch (err) {
+      console.error(`[Config] Error loading ${configPath}:`, err);
+    }
+  }
+  return defaults;
+}
+
+module.exports = {
+  CONTENT_DIR,
+  loadSiteConfig
+};