* feat(blog): add Astro blog at /blog with 16 SEO-optimized posts
Adds a static Astro blog built during Vercel deploy and served at
worldmonitor.app/blog. Includes 16 marketing/SEO posts covering
features, use cases, and comparisons from customer perspectives.
- blog-site/: Astro static site with content collections, RSS, sitemap
- Vercel build pipeline: build:blog builds Astro and copies to public/blog/
- vercel.json: exclude /blog from SPA catch-all rewrite and no-cache headers
- vercel.json: ignoreCommand triggers deploy on blog-site/ changes
- Cache: /blog/_astro/* immutable, blog HTML uses Vercel defaults
* fix(blog): fix markdown lint errors in blog posts
Add blank lines around headings (MD022) and lists (MD032) across
all 16 blog post files to pass markdownlint checks.
* fix(ci): move ignoreCommand to script to stay under 256 char limit
Vercel schema validates ignoreCommand max length at 256 characters.
Move the logic to scripts/vercel-ignore.sh and reference it inline.
* fix(blog): address PR review findings
- Add blog sitemap to robots.txt for SEO discovery
- Use www.worldmonitor.app consistently (canonical domain)
- Clean public/blog/ before copy to prevent stale files
- Use npm ci for hermetic CI builds
* fix(blog): move blog dependency install to postinstall phase
Separates dependency installation from compilation. Blog deps are
now installed during npm install (postinstall hook), not during build.
