feat: complete FIT Labs landing page

- Astro static site with Tailwind CSS v4
- 6 sections: Hero (gradient mesh), About, Capabilities, Differentiator, CTA, Footer
- Sticky navbar with mobile menu
- Scroll reveal animations
- SEO meta tags and structured data
- Docker + nginx config for Coolify deployment

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -12,6 +12,8 @@
     "astro": "astro"
   },
   "dependencies": {
-    "astro": "^6.0.4"
+    "@tailwindcss/vite": "^4.2.1",
+    "astro": "^6.0.4",
+    "tailwindcss": "^4.2.1"
   }
-}
+}